Junior High School Physics and Chemistry Class (20)

Word count: 11188
Junior High School Physics and Chemistry (20) One thing I find really cool about the cram school my junior high kid attends—Bede Gifted Academy—is that its holidays are never strictly regulated. For example, although the DPP has leaned towards capital since taking power and doesn't like typhoon holidays, occasionally, even though the mayor is reluctant, they still announce a typhoon holiday, and Bede will still assess the wind and rain themselves; if the wind and rain are too light, they will definitely make us go to school to catch up on the curriculum. For example, this Double Ten National Day holiday, we still had to obediently go to cram school. "We've already talked about the rectilinear propagation of light and the reflection of light; today we'll talk about the refraction of light."
It was a slightly chilly autumn day, and although Ms. Li Zhenzhen was unusually dressed in a red mini-skirt, revealing her long legs, her upper body was tightly covered, and she wore a red shiny leather jacket. She looked cheerful, but nothing like her usual radiant self. Tang Chenwei, Chen Yuhao, and Huang Ruoli, also seemed uninterested in the teacher's conservative attire, all leaning towards the classroom with their right hands propping up their cheeks. "Light and sound are both waves, but sound waves are explained in Chapter 3, while light is in Chapter 4. This arrangement shows that they are actually different. For example, sound is a mechanical wave, traveling relatively fast in a medium, and the speed of sound in solids is greater than in liquids, which is greater than in gases. Mechanical waves cannot be generated in a vacuum." After saying this, the teacher took out a flesh-colored dildo and comically began to dance. Her dance moves were so ridiculous that they were completely unlike her self-proclaimed status as someone who had attended dance classes before high school. "I have a dildo, I have a mouth. Uh, dildo mouth!" The teacher shoved the dildo into her mouth, then pulled it out. Damn, it was a parody of the currently popular PPAPP. But this comical insertion immediately brought the trio back to their proper listening posture, focused on what other "good stuff" the teacher would deliver next. "If this dildo was a mechanical wave, what properties would change when it entered a solid medium from air? What properties would remain unchanged?" The teacher waved the large dildo in her hand, gesturing near her mouth. Ah, this was a review of the sound wave chapter. Waves penetrating different media are called refraction; the frequency doesn't change, but the wave speed will definitely be different depending on the medium. However, wave speed equals frequency multiplied by wavelength, so the wavelength must change. I recalled the horrifying scene where the teacher had Chen Yuhao's penis thrusting in and out of her mouth to demonstrate this property, culminating in oral sex. "Today we'll continue our in-depth exploration of the refractive properties of light. When light enters different media, it changes not only its wave speed and wavelength, but also its angle." After saying this, the teacher took off her coat, lifted her shirt, and revealed... a vest! Was this Sanxiao? I thought she'd be more covered up today, but she was wearing something far too revealing—a black patent leather vest that was practically exposing her breasts! The vest accentuated her figure, making her waist appear even slimmer and her breasts larger. I think even in a regular vest, her breasts would almost burst out. Now, with her breasts exposed, although firm, their large size meant that the lower edges of her breasts inevitably showed signs of gravity pulling them, forming two perfect semicircles above her ribs. "I'd like to ask one student to come to the front to assist me with the explanation." Before the teacher finished speaking, Tang Chenwei and I raised our hands almost simultaneously. "You two stand up." After the teacher finished speaking, Tang Chenwei and I stood up, but the teacher glanced at our lower bodies and shook her head, indicating that we should sit down. "Huang Ruoli, stand up." Actually, Huang Ruoli had also wanted to raise his hand, but he was too slow to react, which gave the opportunity to Tang Chenwei and me. Now that he had a chance to turn the tables, he indeed stood up, his crotch bulging. "Okay, it's you I decide." The teacher smiled as she looked at Huang Ruoli's crotch. Was it really because Tang Chenwei and I weren't erect that we lost our chance? Damn it, it's all Zhen Shuzhu and Li Fa's fault. After sleeping with them a few times, I'm no longer so sensitive to the opposite sex's body, unlike Huang Ruoli, who still has the body of a tender middle school student who gets an erection with the slightest breeze. He lost this opportunity for no reason. "Come on, Huang Ruoli, take off your pants and lie down here." At the teacher's seductive prompting, Huang Ruoli lay down on the table in the first row with his back to us, his legs dangling over the edge of the table, his penis sticking up high. Huang Ruoli's penis is the largest I've ever seen, a full 17.5 centimeters. However, he has premature ejaculation, although he doesn't seem to care at all. He believes a good penis should be able to ejaculate whenever it wants, reaching orgasm at will. "This is Huang Ruoli's 'incident light'," the teacher said, facing the students and instructing us to use Huang Ruoli's towering penis as the incident light. "Please control its direction." Then, Huang Ruoli was instructed to grip his penis. My god, the teacher is getting more and more outrageous! Last class, he used a dildo as the incident light, his own pubic hair as the normal, and a split as the interface. Today, if he uses the penis as the incident light, everything else remains the same, wouldn't the teacher inevitably have to be penetrated to illustrate the relationship between incident and refracted light?! My penis, now nearly 15 centimeters, already puts a lot of pressure on the teacher's vagina. If Huang Ruoli's is 175 centimeters... wait, is he still not fully developed? If it grows to 20 centimeters, will the teacher's vagina still be able to hold it? No, I would rather die than see the teacher's vagina filled with someone else's penis again! However, seeing the teacher's sexy breasts near Huang Ruoli's erect penis, this lewd scene certainly has sexual connotations, and my penis only slowly hardened at this moment, the timing of the engorgement was really bad!
Just as she thought of this, the teacher's breasts were already in contact with Huang Ruoli. The teacher, with her F-cup breasts, let her full breast tissue come into contact with Huang Ruoli's already swollen and purplish glans from top to bottom. Then, the teacher slowly squatted down, spreading her legs, revealing white silk panties under her short skirt. The white panties were particularly eye-catching against the red skirt, but even more eye-catching was the movement of her upper body. Huang Ruoli's glans pressed against the teacher's breast, causing it to indent, but his penis couldn't possibly penetrate it. So, the glans eventually slid to the side, running along the outer edge of the teacher's breast all the way to her armpit. The teacher jokingly used her armpit to hold Huang Ruoli's penis, deliberately teasingly uttering, "Uh! Armpitpens," continuing the previous prank. Sigh, you can act however you want today, just don't turn into "Uh! Pussypsy!" Huang Ruoli's expression was quite complicated. He was lying on the table, the teacher between his legs, his glans pressed against her breast tissue. He only needed to tilt his head slightly to see her alluring figure, and feel the soft touch of her breasts. However, he didn't seem very excited, just frowning. "Sorry, the friction is probably too much, wait a minute." The teacher noticed this and quickly lowered her head. When her eyes met those of the class again, she had a swollen, red penis in her mouth, and she was actually taking Huang Ruoli's penis into her mouth! The teacher's cheeks puffed out slightly, and her eyes, with their sclera showing, glared at us like a delinquent girl. But her mouth didn't stop; she moved it up and down several times to make sure her saliva moistened Huang Ruoli's glans. Luckily, this time she was only trying to reduce friction between the glans and the breasts, so she didn't really suck hard. Otherwise, given Huang Ruoli's inexperience, he might have ejaculated in her mouth at any moment. I watched nervously as Huang Ruoli's penis left the teacher's mouth, making sure it was still hard and hadn't ejaculated before I felt a little relieved. Next, the teacher had Huang Ruoli's penis pressed against her breasts, then she half-squatted, letting Huang Ruoli's glans apply pressure to her breasts. This time, Huang Ruoli's penis slid all the way to the teacher's cleavage, creating a suggestive scene, somewhat like a Uni-President burger that had risen in price to almost more than a bento box. "Can you see the difference between these two times, students?" The teacher held the lower edge of her breasts with both hands, gesturing around Huang Ruoli's penis to simulate the previous movements. It's not that I'm deliberately being disrespectful to the teacher, it's just that I genuinely can't tell. "One more time, watch carefully." After saying that, the teacher had Huang Ruoli's penis tip press against her breast, and then, after the breast had sunk to a certain degree, the penis deviated from its original path and slid down to her armpit. Then the teacher repeated these movements, Huang Ruoli's penis sometimes near her armpit on the outside of her breast, sometimes between her two large, white mounds. "It's normal not to understand, after all, even Newton made mistakes sometimes." After saying that, the teacher drew a diagram on the electronic whiteboard. "Initially, Newton attempted to explain the refraction of light from a particle perspective, while another scientist, Huygens, explained light as a wave. Due to Newton's unshakeable authority, the wave theory was not taken seriously at the time. However, it was later discovered that Newton's particle theory could explain the rectilinear propagation and reflection of light, but predicting the path of light using the laws of motion and concluding that the speed of light increases due to gravity in a medium was incorrect. The speed of light should actually decrease when it enters a medium from a vacuum. Therefore, the theory of the particle and wave duality of light came about later." The teacher drew a diagram of the relationship between the incident ray and the refracted ray, speaking fluently. "In fact, after light enters a medium, due to the change in the speed of light, not only does the wavelength change, but the path of travel is also deflected. So, after this incident ray was incident on, the refracted light deflected here; when incident at this angle, the refracted light deflected this way again." The teacher took out crayons and drew red and blue normals and refracted lines on her breasts to show that the direction of deflection varied depending on the angle of Huang Ruoli's penis. Looking at the teacher's once flawless, porcelain-white breasts, devoid of even a single mole, now marred by strange red and blue marks, I felt no regret for the ruined beauty. Instead, I recalled how I had painted with my semen all over her body, including her face, and the vibrant colors that appeared under a multi-wavelength light source. I wondered if she was thinking about our passionate private tutoring session. Otherwise, why would she be dancing and painting in class?
These elements, seemingly unrelated to physics and chemistry, were being used in class. Perhaps she was unconsciously reminiscing about our time together. "If I ejaculate from this side this time, guess which way it will deflect?" This time, the teacher positioned the tip of Huang Ruoli's penis against the space between her breasts, above the xiphoid process, which was taught during CPR in scout class, extending upwards to her seemingly bottomless cleavage. Of course, it wouldn't deflect! It would go straight into her cleavage, turning into the teacher giving Huang Ruoli a blowjob!
"No deflection?" Tang Chenwei replied. "Really?" The teacher first feigned suspicion, then squatted down slightly, allowing Huang Ruoli's rays to gradually touch her chest, then slide precisely between her breasts. The teacher, worried everyone wouldn't see clearly, cupped her large breasts with both hands, making the cleavage more defined. Huang Ruoli's swollen, purplish penis looked terrifying against the white background. Later, fearing her long hair would obscure her view, she tied it into a bun. The moment she raised her hands, her already firm breasts were pulled even higher, the lines between her high breasts and armpits incredibly sexy, making my penis ache. Stop! I already know that light doesn't deflect when it enters a medium! "Yes, but why doesn't it deflect?" The teacher was hooked, seemingly wanting to master the breast-playing technique, constantly squeezing Huang Ruoli's penis up and down with her breasts. I figured there must be a reason why the teacher was doing this. Could it be that her relationship with her boyfriend, Teacher Cai, had thawed, and she was using the students to practice breast sex to soothe Teacher Cai's wounded heart? Just as we were pondering this mystery, Huang Ruoli, the man with the enormous penis and premature ejaculation, couldn't take it anymore. He couldn't endure both oral sex and breast sex, so his purplish-red glans sprayed out cloudy semen. Immediately, a glob of thick semen, somewhere between solid and liquid, clung to the teacher's chin, then dripped onto her large breasts. Huang Ruoli's penis continued to ejaculate. To make sure the penis hadn't changed position, the teacher looked down to check the relative location. Because of this, her delicate face was inevitably stained by Huang Ruoli's endless ejaculation, with a few drops of the foul-smelling semen on her eyebrows and the corners of her mouth. She unconsciously frowned. But it was precisely this alluring yet coy demeanor that made Huang Ruoli grit his teeth and desperately ejaculate onto the teacher's face and chest, releasing a massive amount of semen I had never seen before. His enormous penis shrank into a small, indistinguishable mass of foreskin and shaft within seconds, yet the teacher still carefully kept it resting on her cleavage, preventing it from slipping out between her breasts. "The laws of refraction and reflection are essentially the same: the incident ray, the normal, and the refracted ray must be in the same plane, and the incident ray and the refracted ray must be on opposite sides of the normal. The only difference is that in the law of reflection..." The angle of incidence equals the angle of reflection. The angle of refraction is explained by Snell's Law—the refractive index of the incident medium multiplied by the trigonometric function sin of the angle of incidence equals the refractive index of the refracting medium multiplied by the sin of the angle of refraction. If you can't remember, just remember that the semen spraying 'wet' the teacher's 'breasts' is what makes you bastards, the 'Wet Milk Law'! The teacher glared at us deliberately, and with her sexy appearance, her face and nipples smeared with a little semen, I actually remembered the "Wet Milk Law"! Because we are all gifted students in a broad sense, especially at Bedford Gifted Education Academy, we had already learned basic trigonometric functions in mathematics; otherwise, we wouldn't have learned them until the second year of high school. We then understood that, generally, if the speed of light in a medium is high (i.e., a medium with a low refractive index), the corresponding angle must be large, and if the speed of light in a medium is low, the corresponding angle must be small. This conforms to the corresponding relationship of sin values in trigonometric functions. However, when the incident ray is perpendicular to the interface, that is, when the angle of incidence is 0 degrees, since the sin value of 0 degrees is 0, the angle of refraction must also be 0 degrees. "Yes, according to Welsh Elliott's Law, 0 equals 0. So when Huang Ruoli's penis is perpendicular to the line connecting the lower edge of the teacher's breasts, it directly penetrates the teacher's cleavage without any angle of deflection." "Does everyone understand?" The teacher's explanation was indeed the same as my understanding. Only at this moment does the incident ray not deflect, and the angle of refraction equals the angle of incidence, which equals 0 degrees. At other times, the angle of refraction will not equal the angle of incidence. After confirming that everyone understood Welsh Elliott's Law, the teacher wiped the semen off her face and chest with a tissue, along with the crayon marks, which were also wiped away without a trace. However, she was still wearing that sexy vest, exposing her breasts, without putting on her top. Seeing that Teacher Li Zhenzhen had wiped away the red and blue marks on her chest and restored her perfect large breasts, I felt a little melancholy, as if my connection with the teacher had been severed. Huang Ruoli rarely had the opportunity to have intimate contact with the teacher, instead of just hiding behind the teacher and secretly masturbating as before. In the following class, his eyes shone with satisfaction, unlike before when he was always absent-minded and like a simpleton. Oh no! What if Huang Ruoli scores higher than me on the next quiz? After all, quiz scores might affect the benefits of the second half of class, and whether or not you can go up to help explain is mostly based on your quiz results! It turned out I was worrying unnecessarily. Huang Ruoli kept fantasizing about the teacher's breasts while writing her test, resulting in a ridiculous score of 28, while I got the highest score. During the break, the teacher answered students' homework questions with her breasts exposed. Her sincere appearance was not diminished at all by displaying her female characteristics. In addition, Zhen Shuzhu and I became closer, and probably because of her influence, the female students were not reluctant to mingle with the teacher. Some even asked how the teacher developed such large breasts, since at this age, many female students had not yet finished developing and their breasts were as flat as those of elementary school girls. After the break, the second half of the class continued. At the beginning, the teacher asked the top students in the quiz to come to the front of the class to prepare. "The phenomenon of refraction is everywhere in life. For example, rainbows are caused by the refraction of light, which separates the originally one light into light of various wavelengths such as red, orange, yellow, and green. There are also various applications of lenses, etc."
"Do you all know the names of these lenses?" The teacher drew six lenses on the whiteboard. Two were typical convex and concave lenses, and two others were flat on one side and concave or convex on the other. One was the kind used for nearsighted glasses, and I didn't recognize the other one that looked like a convex lens. "Let me see your wolfish nature." Seeing that no student dared to answer, the teacher encouraged everyone by mentioning "wolfish nature." As the first student to "indulge" in the teacher's words, I quickly raised my hand. "Very good, Chen Jianian has wolfish nature, but you're a wolfhound, after all, a dog, not a wolf." The teacher made a pointed joke at me. The students were all enjoying it, but I felt that the teacher's tone was strange. "So, is the teacher a goddess, or a 'goddess'?" Chen Yuhao asked, following the teacher's lead. "What is a 'goddess'?" the mischievous Tang Chenwei asked. "It's a prostitute." Chen Yuhao deliberately answered in a voice that the whole class could hear. Damn, your girlfriend is a goddess, your whole family are goddesses! The teacher, used to such risqué jokes, chuckled, "Yes, I'm your goddess. 'Goddess' just modifies 'god,' but the emphasis becomes on 'woman.' It's like Chen Jianian being called a wolfhound—just a dog, not a wolf." The teacher then steered the conversation back to me, emphasizing again that I was a dog. Wait, why didn't she call me "Xiaoping"? Did Li Fa want me to call her Fafa to show a closer relationship, while the teacher reverted to my real name because we'd drifted apart? "Simply put, a lens that's thicker in the middle than on the sides is called a convex lens, and conversely, a lens that's thinner in the middle is called a concave lens. This kind, used for correcting nearsightedness, is a concave lens but looks convex, hence the name 'convex-concave lens.' 'Convex' just modifies the concave lens." The teacher explained, pointing to the diagram on the whiteboard, without glancing at me again. "And by the same logic, lenses for correcting farsightedness are concave and convex lenses. These are biconcave, biconvex, plano-concave, and plano-convex lenses," the teacher explained. "Actually, any concave lens can correct nearsightedness, but why are all our nearsighted glasses convex and concave lenses? It's mainly to reduce aberrations and to determine the direction of the fragments when broken by external force. We don't have time to explain everything, so please just get a general idea, but we can still give a brief explanation." As the teacher spoke, he pointed to the students who had just scored the highest on the quiz, and then gestured with his index finger towards our lower bodies. I was still wondering why the teacher had joked twice that I was a dog, and I didn't think he was joking at all. Unexpectedly, Tang Chenwei and Chen Yuhao seemed to understand the teacher perfectly, immediately pulling down their pants without hesitation, revealing their still-soft penises. "Think about it, everyone. Right now, your penises and your eyes are both in the same medium as the air. The penis reflects light, so its shape enters your eyes. But as we discussed in the first lesson, light travels in a straight line. Having lived on Earth for so long, you all have an experiential understanding of this straight-line travel, so you naturally take 'seeing is believing' and assume that what you see is the actual location." The teacher pointed to the penises of Tang Chenwei and Chen Yuhao, and it was only then that I realized what was happening and started taking off my pants. "If the light enters a different medium, its direction of travel changes, and it will look like this." After saying that, the teacher actually squatted between Tang and Chen with her legs wide open, her sexy panties completely exposed under her red skirt, and she even took Tang Chenwei's penis into her mouth. Before I could fully process this astonishing scene, the teacher gently spat out Tang Chenwei's penis and turned to take Chen Yuhao's penis into her mouth! The teacher alternately sucked on their penises, but only briefly each time, without much further movement. Tang Chenwei was overjoyed; after all, he had spent so much money and effort trying to have sex with the teacher. Although he hadn't actually succeeded, the fact that the teacher had put his glans in her mouth was a good start. Previously, the teacher had only ever given him handjobs; Chen Yuhao, on the other hand, had never experienced oral sex from a teacher. "Guess where Tang Chenwei's glans is now? Show me with your fingers." The teacher said, then put Tang Chenwei's penis back into her mouth, and the students obediently pointed in a general direction. "Wrong, it's here." The teacher, keeping Tang Chenwei's penis still in her mouth, spoke indistinctly, then pointed with her finger, indicating that it was now closer to her throat than it had been near her cheek. Then the teacher spat out the penis. Sure enough, Tang Chenwei's glans wasn't near her cheek as we had imagined; because Tang Chenwei was erect, his thick penis, judging from the previous position, was deeply inserted into her throat! The teacher's eyes reddened slightly and her voice became hoarse as she spat out the penis, stimulated by her uvula. She coughed a few times. "Is the teacher alright?" Tang Chenwei, his penis erect from lust, acted like the model student he always was, bearing the reputation of a tutor. He didn't rush into any lewd behavior despite his erection; instead, he showed concern for the teacher. "I'm fine," the teacher smiled gently at Tang Chenwei and continued her explanation. Damn it, how could this happen? Tang Chenwei, don't pretend to be good! Use force and keep shoving your penis in the teacher's mouth to make her hate you! "The wavelength of the penis changes after entering the teacher's mouth, but you still speculate on the direction of the penis, thus causing a positional error. This is the basic principle of aberration." After the teacher finished speaking, she took turns sucking on Tang and Chen's penises, one on each side, until their penises were erect before continuing her explanation. "Because light is deflected when it enters a medium, we often mistakenly think that fish in the water look shallow and can be caught by hand, but in fact, they are deeper than we imagine. So if you want to use a harpoon to stab fish on the shore, you should aim at a deeper spot. Conversely, the scenery on the shore appears taller to fish in the water, so you don't need to sneak around trying to catch fish on the shore. Every move you make is magnified in the fish's eyes after refraction." When I heard "sneak around," I thought of my experience of secretly ejaculating inside the teacher and Zhen Shuzhu, and I felt a little guilty. "Chen Jianian, you lie here as a benchmark for comparison." After saying that, the teacher told me to lie down on the first row of tables, but her eyes seemed unwilling to look at me directly, and she never met my gaze. Unlike Huang Ruoli, who had a firm penis, my penis was completely unable to get hard because the teacher was surprised and fearful that she hadn't called me by my nickname and had been taking turns giving oral sex to Tang Chenwei and Chen Yuhao. I just lay on the table, staring blankly at the ceiling, completely oblivious to the teacher's interactions with the others. However, this feeling of confusion didn't last long. The warm, wet touch on my foreskin made me realize that someone was giving me oral sex. I quickly looked up and saw that it was Teacher Li Zhenzhen gently licking the tip of my penis! Great! The teacher was just trying to scare me. It was probably because she ejaculated inside Zhen Shuzhu in class last time that she let Cheng Yixin penetrate her. Even today, she warned me in front of me by having two women do the same thing. But all that is in the past. Now she is treating my penis gently, just like she has demonstrated in almost every class before. I will never steal again. Even if Zhen Shuzhu still owes me one time, I will never ask her for it again!
I happily let go of my doubts and let my penis quickly become erect, even though the teacher hadn't yet taken my entire glans into her mouth. "Seeing is not necessarily believing. In optics, there's a distinction between real and virtual images. A real image is formed by actual light rays, while a virtual image is not. I often say that we learn physics and chemistry not just as a subject, but also as principles of life and conduct. Someone who seems weak may not be truly weak, and someone who seems sincere may not be truly sincere." The teacher looked at me meaningfully, and I guiltily recalled that I shouldn't have been discovered by anyone when I ejaculated inside Zhen Shuzhu a few days ago. "When my penis entered her mouth just now, it actually did get bigger, but many phenomena in life are illusions caused by the refraction of light. For example, chopsticks in water appear to be broken." After saying this, the teacher, just like when she had given Huang Ruoli a blowjob, sandwiched my erect penis between her large, white breasts with faintly visible blue veins. "The chopsticks look broken because their image in the water refracts through the air, causing a directional distortion. However, we perceive the chopsticks as being on the extended line of this distortion, making the water-based image appear disconnected from the air-based image." The teacher finished speaking and half-squatted down, using her breasts to perform a nipple play on me. "But from Chen Jianian's current position, whether looking up or down, you can't see the refracting of light. This is the same principle as Snell's Law." The teacher diligently used both hands to push her breasts towards my penis, changing the height of her breasts as she moved up and down, mainly using the transitions between a slight half-squat and a wide-legged squat to perform the nipple play. I had initially thought the teacher was dissatisfied with me, but now, back in the gentle embrace of her breasts, I closed my eyes contentedly, enjoying the warm stimulation of the glans. The teacher even seemed afraid I wasn't satisfied, twisting her body left and right each time she lowered my penis past her cleavage… However, this enjoyment only lasted a moment before Li Fa's voice interrupted my reverie. "Teacher, this isn't fair to Chen Jianian; he can't see the demonstration under the table." Li Fa spoke expressionlessly, or rather, with a sorrowful expression, raising his hand. What? You stinky Li Fa, don't interfere! I opened my eyes and saw the teacher's huge breasts still tightly gripping my penis, and I felt a little annoyed that Li Fa was interrupting my enjoyment. I had just slightly straightened up, wanting to turn around and signal to Li Fa not to be so oblivious, when I saw Tang Chenwei and Chen Yuhao under the table. They were lying on either side, their already erect penises raised high, smiling, and both of them were holding their penises tightly with their right hands, making them perpendicular to the ground. When a man is erect, his penis actually points towards his lower abdomen. If he is just lying on the ground without using his hands, his penis will be against his stomach, not perpendicular to the ground. Why are they doing this?
But the next scene answered my question. I saw the teacher answering Li Fa's question while repeating the half-squat to hip-squat movement. "Or you could come out and pair up with some other male classmates so Chen Jianian can see my explanation too?"
The teacher responded to Li Fa's request with a smile, seemingly nonchalant, but I knew it wasn't a genuine smile. Her genuine smile was the kind she'd give when rescuing a puppy by the stream! Now I finally understand why, even though the teacher was explaining the seemingly broken chopsticks, her chest movements and my penis showed the special case of them not being broken. It's because the teacher was actually explaining in two parts: the upper body breast play explained the special case, where refraction isn't visible at an angle of incidence of 0 degrees; the lower body truly demonstrated the deflection of light as it passes through a medium. The teacher squatted down slightly to the right above Tang Chenwei's penis. The tip of Tang Chenwei's penis first pressed against the teacher's left thigh, then slid to the right until it touched the tip of her pubic hair. Then, the glans pried open the teacher's vulva, and without effort, his penis, between the teacher's legs, plunged deep inside her!
Before I could even express my shock in words, the teacher had already half-squatted up and then shifted her buttocks slightly to the right. This time, Chen Yuhao's penis pressed against the teacher's right thigh first. As long as she held his penis firmly to prevent it from bending, the teacher herself exerted downward force, allowing Chen Yuhao's glans to slowly slide into her vagina, squeezing her clitoris until it was visibly engorged with blood and protruding significantly from between her pubic hair! I knew why the teacher was wearing a vest; it turned out she was going to ride on top of someone! "Because the teacher deliberately set their 'entry rays' at different angles of incidence into the vagina, a deflection phenomenon occurs. Given their almost perpendicular angle of incidence just now, it must have deflected inside the teacher's body now." The teacher kept Tang Chenwei's penis inside her vagina, her right hand reaching down to Tang Chenwei's crotch to trace the angle, her fingers shamelessly tracing a path from Tang Chenwei's penis down to her own genitals. She continued, "Tang Chenwei's 'entry ray' was originally like this, but now its direction inside the teacher's vagina is approximately like this."
What "entry ray"? That's Tang Chenwei's penis! It could erupt inside you at any moment! You're a young female teacher in the prime of your life, still at the age where you can conceive—aren't you afraid of getting pregnant?!
I've slept with teachers a few times under the guise of experiments or tutoring, so seeing someone openly using a teacher's body for experiments is quite jarring. Although the scene before me was unbearable to watch, I still paid close attention, wondering if, as the teacher had just said, many seemingly tangible images were actually illusions, and she was using visual illusions to make me believe that Tang Chenwei's penis was inside her when it wasn't. However, as Tang Chenwei inserted himself diagonally into the teacher's body, and the angle of his penis bending to the side decreased, causing the teacher's labia minora to also bend to one side due to the lateral force, Tang Chenwei truly got his wish. Without using any props or his status as the boss's son, he easily made the teacher willingly ride on his penis. Even worse, the teacher didn't just satisfy Tang Chenwei. She alternated between riding Chen Yuhao and Tang Chenwei's penises at a frequency of about two seconds per thrust. Although both penises were subjected to skewed forces, she herself was satisfied from both sides. Whether Chen Yuhao's hard penis entered her from the left or Tang Chenwei's slightly thick penis entered from the right, both sides of her vaginal walls were pleasured by the young penises, her tight vagina filled to bursting with glans. "Chen Jianian didn't see clearly just now, I can take over the teacher's actions. Please concentrate on explaining so Chen Jianian understands the phenomenon of refraction." Li Fa began to take off her khaki pants expressionlessly. Only then did I notice that she was also wearing casual clothes today, looking so sunny and cute, unlike the precocious but awkward little girl who didn't know how to interact with others. Wait, does this mean she wants Chen Yuhao and Tang Chenwei to alternately penetrate her vagina, and I just need to concentrate on watching? That's too much of a sacrifice! Although I had complained that Li Fa hadn't stopped Cheng Yixin from having sex with the teacher, I absolutely didn't want to see her sacrifice so tragically! Judging from how skillfully she taught me about sex before, she was very likely not a virgin, but sacrificing herself for Tang Chenwei and Chen Yuhao because of our insignificant friendship seemed like too much of a loss! But at least this way, Teacher Li Zhenzhen wouldn't have to use her vagina to put on two ugly penises anymore. Before they both ejaculated, should I express my opinion as the top scorer on the quiz? It was a real dilemma! In the few seconds I was thinking, Li Fa had already stripped naked from the waist down without hesitation. Although she was already pubic hair at her age and had a fairly large bust for a middle school student, making her quite a pretty girl, her usual innocent personality and selfless appearance at this moment made her seem as pure as a baby in my eyes. I couldn't imagine what it would be like for her to have a penis inside her. "But Chen Jianian already got such a high score on the quiz. Sacrificing a little to miss this part would allow other students to see his brilliant performance, improving the whole class's grades. Isn't that better?" The teacher countered Li Fa's opinion, still alternating between having sex with the two male students. Hearing that Li Fa was willing to take the teacher's place, Tang Chenwei and Chen Yuhao had expressions of both laughter and tears. After all, they had been longing to finally get their hands on Teacher Li Zhenzhen, but Li Fa's usual icy and shrewish demeanor seemed quite enjoyable to play with. However, with Teacher Li Zhenzhen's alluring breasts right in front of them, there was no reason to switch partners before they had had their fill. Besides, if they could reach orgasm and secretly ejaculate inside the teacher, that would be much more appealing than simply having sex with Li Fa. It was only the first semester of the second year of junior high school; there were plenty of opportunities to have sex with teachers or classmates. If it were me, I might choose to continue having sex with the teacher, perhaps because of my attachment to teachers. I made up my mind. I couldn't let Li Fa suffer. Even if she wasn't a virgin, her vagina was definitely not yet familiar with the feeling of intercourse, let alone having to swallow two penises at the same time. The shame was no less than twice that of simply having sex in front of classmates. "Teacher, Li Fa is right. It's a pity I didn't see your demonstration. However, Li Fa's vagina is probably not used to penises yet. My penis is the smallest, so why don't I demonstrate the refraction of light with Li Fa? Unlike your actions, I'll be on top and Li Fa on the bottom. The two groups demonstrating one after the other will make it clearer for the classmates." I made up my mind that if I took the initiative, at least I could be gentler, or even deceive them by not entering Li Fa's vagina at all, thus preserving her virginity. Actually, my penis is not small now, but most of the classmates except Zhen Shuzhu probably don't know that. Plus, given the stereotype that Tang Chenwei usually teases me, my explanation might be acceptable. "Then He Mengxian, who got the fourth highest score, will replace Chen Jianian." After saying that, the teacher continued his breast-fucking act, but this time the object was He Mengxian, while his crotch was still manipulating the penises of Tang and Chen on the left and right. "You don't need to do this." I spread Li Fa's legs apart on the back of the table where no one was sitting, so that her vulva faced the whole class. Then, with my back to the class, I pressed my penis against the inside of her thighs near her vulva, and then thrust hard, but it slid away from the entrance, making it seem like I was trying to accidentally insert it incorrectly each time, so I couldn't successfully enter her vulva. "You're the one who doesn't need to do this. This way, the teacher will..." Li Fa looked at me with a gentle expression, as if she was a little relieved. "Sigh." I repeated the action of pretending not to be able to find the hole, while observing Li Fa's vulva. There was actually a small hole that was bigger than my glans. Li Fa was indeed not a virgin. "Senior, isn't it supposed to be the refraction of entering different mediums? You haven't even entered." The cheerful junior Cheng Yixin, who skipped a grade in the first year of junior high, suddenly blurted out from behind me. Why did Ma, that clueless idiot, see so clearly? I haven't even settled the score with you for last time when I ejaculated inside the teacher! But I know he meant no harm; he's always been this overly cheerful, bordering on clueless. Sigh, I originally wanted to just get through this class and preserve Li Fa's virginity, but since Li Fa and I are such good friends, and she's no longer a virgin, I might as well just do a couple of quick thrusts to get by. Having made up my mind, I glanced at Li Fa, and the understanding girl nodded at me. Then I slowly, little by little, inserted the head of my penis into Li Fa's small, cute vagina. (
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Junior High School Physics and Chemistry Class (20)

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