My mother and I demonstrate sexual intercourse.

This happened when I was in fifth grade. That June, after the final exams, I was free at school. One day, Ms. Chen asked if I could help tutor a junior student. Of course, I said no problem, because Ms. Chen was the most beautiful woman in the school; although she was married, she was still stunning. Ms. Chen asked me to bring my mother too, saying she could treat us to dinner after class to thank me for my help, so I brought my 38-year-old mother along.
My mother's name was Huang Meilian; she was 38 years old at the time, 5 feet 2 inches tall, with measurements of 36C-25-34. I was 17 years old then, 6 feet tall, and weighed 120 pounds, one of the most handsome guys in the school, so it wasn't surprising that the teacher asked me for help, and I was happy to help Ms. Chen.
That day, I arrived at the small room next to the classroom early in the morning, and my mother came with me.
"Li, you're here really early; did you bring your student ID?"
"Yes."
After handing over the student ID to Teacher Chen, she took a set of hospital gowns from her drawer and gave them to me. "Turn left at the end of the door, there's a changing room on your right. Take off your clothes and pants and change into this hospital gown."
Looking at the "set" of clothes in her hand, it was at best just a piece of cloth with two sleeves sewn on.
After taking off my outer clothes and pants, I hesitated whether I should take off my underwear as well. Two years in the army had indeed made me more thin-skinned, so I decided to wear my underwear and put on the hospital gown before returning to the office.
"Li, did you take off your underwear too?"
"Ah, no."
"Then take it off."
"Okay."
It was the first time I'd taken off my underwear in front of Teacher Chen without doing anything. After taking it off, I couldn't help but tug at my shirt, as if worried that Teacher Chen would see my private parts. Teacher Chen glanced down at my lower body slightly, then looked back at the desk and continued typing. I, on the other hand, felt like I was sitting on pins and needles, fidgeting and constantly tugging at my shirt. Finally, Teacher Chen stood up, nodded, and gestured for me to follow her, leading me into an empty room.
"Li, please wait here for a moment."
"Okay."
Then she opened the door and went into the adjacent classroom. I could hear many people whispering inside, very softly.
"Dear students, in order to help you get into the swing of things as soon as possible, the school has arranged for some senior students to help you with a live dissection."
The senior students must be referring to me? Live dissection? I was filled with endless confusion.
"Vivisection not only explains the organs of the human body, but also hopes that you students will gain a deeper understanding of the human body through touch, sight, smell, and even hearing."
For some reason, I had a vague feeling that something was wrong.
"Well then, let's welcome Li from the senior class with a humble and eager-to-learn attitude."
At this moment, Teacher Chen opened the door again. "Li, it's alright, please come to the front of the classroom."
It turned out that she had just entered a classroom. When I entered the classroom, I saw about thirty male students sitting in their seats (because I attended an all-boys school). They were all craning their necks to look at me, their eyes seemingly shining.
"Yes, everyone, please treat Li as a living organism for now, and the class will proceed more smoothly."
Teacher Chen then turned to look at me. "Li, please take off your patient gown."
Uh, if I take off this patient gown, won't I be naked in front of more than thirty men? The male students began to whisper among themselves when they heard the lecturer say this.
"Class, please raise your hand if you have any questions. Whispering like this is very impolite to me, and to this living, breathing person on stage—uh, I mean, Li."
He continued to look at me, seemingly waiting for my next move. I reluctantly removed the cloth covering my sleeves. After Professor Chen took it, all eyes were on me, naked in front of the podium.
"Yes, what is presented before you is a male body. You can clearly see that the biggest difference between a man's body and your own is that he lacks breasts; instead, he has thicker muscles. And the lower body..."
The professor gestured for me to raise my hands covering my genitals. "We can see that the male lower body consists of the penis and the scrotum."
This was the first time I had been naked in front of men, and in front of more than thirty men at once.
"Actually, you'll have many opportunities to see male bodies after graduation, whether it's male patients or your boyfriends, but none of those will be like today, where you can learn about the different parts of a man. Okay, does anyone have any questions?"
"Teacher..."
A student raised his hand. "Um, Wang, please go ahead."
"I want to ask, how do men have sex?"
"Very good question. Although it's not part of today's male anatomy lesson, I'll explain it to you anyway. The male sex organ, the penis, is inserted into the male vagina, which constitutes sex."
"But how can a limp penis be inserted into a vagina?"
The speaker was Wang, who had just raised his hand, his slightly cunning eyes looking at me.
"Yes, today is Li's first time demonstrating a live specimen, so he's a little nervous. When a normal male is stimulated, the penis will become erect due to blood engorgement, and once erect, it can be inserted into the male body." "Teacher,
could you please demonstrate an erection using a live specimen? I mean, could you please have Li demonstrate an erection?" The speaker was still Wang.
"It's probably impossible for Li to get an erection naturally right now, so I'll give him some stimulation. Everyone, please take today's live dissection class with caution, don't think of it as a pornographic demonstration."
With that, the lecturer turned to face me, nodded, and then touched my penis.
"Class, you can all come a little closer to observe the changes in the live penis today."
The lecturer held my penis in her hand, and the students below all moved closer, as if watching an interesting little animal. My penis, which had been shrunken due to tension, unexpectedly began to react and gradually became erect under the watchful eyes of over thirty young men and the touch of the beautiful female lecturer.
"Wow, it's really hard!"
Under the lecturer's caresses, my penis went from being shrunken to erect.
"Classmates, this is a male penis in an excited state."
"Teacher, can we touch it?"
It was Wang again who asked. "Okay, today we hope that you will thoroughly understand the structure of the male body through different sensations. Now, according to the seating order, remember to be gentle when touching it, as the male penis can be quite sensitive at times."
The boys lined up neatly in front of me, waiting to touch my penis. So this is what the teaching model's job is.
At this moment, the teacher removed the hand that had just held my penis. "Then everyone, please take turns touching the male penis and scrotum."
The first student slowly extended his right hand, touched the penis with his fingers, and then withdrew it, causing the other students in the back to burst into laughter. The second one was Wang, who had asked many questions earlier. She reached out and grabbed my penis without hesitation, and even moved it back and forth a few times. This action was just like the action I take when masturbating, except that this hand was not my hand, but the hand of a very young girl with a pretty face.
"Teacher, you just said that we can experience a male body through touch and smell. Can I smell a male penis?"
"Hmm, okay, but remember to be careful."
Wang raised his head, gave me a sly look, and then lowered his head to smell my penis.
"Teacher, male bodies don't really smell. I wonder what they taste like."
Before the lecturer could answer, Wang actually put my penis in his mouth, sucked it twice, and then slipped off the stage. The other students, some shyly touched it, some held the whole penis and stroked it a little like Wang, and some bolder ones even bent down to smell it. But no one dared to open their mouths to my penis like Wang did.
Finally, all thirty-odd male students in the class took turns playing with my penis. At this point, my penis was extremely erect due to the great stimulation, and the tip of the glans even secreted a little prostatic fluid, making it wet.
"Teacher, you just mentioned male-male sex, could you demonstrate?"
The questioner was the same student, Wang. "As for male-female sex, it's inconvenient for the teacher to demonstrate in class. Let
's assume this is a woman's vagina." The lecturer then circled her left hand. "This is how a male penis is inserted."
The lecturer brought her circled left hand close to my penis and began to stroke it back and forth. "However, usually, sex is initiated by the male, who performs the piston-like motion after penetration." "
Then, teacher, could you please have student Li demonstrate, pretending to have sex with the teacher, I mean, with the teacher's hand, and show us?"
The female lecturer glanced at me and nodded, indicating that I should demonstrate. Good heavens, didn't this female lecturer know that besides masturbating a few times, I'm actually a complete virgin? I had no choice but to follow the scenes from porn in my head and pretend to have sex with the female lecturer's hand. Sigh, I never thought that my first time as a virgin would be so unromantic, openly having sex with the left hand of a seemingly unattractive lecturer in front of more than thirty male students.
"Class, this is what sex is all about. But real sex isn't done with a man's hand; it's done through the vagina. Any other questions?"
"Teacher, how does a man ejaculate?"
Finally, it wasn't Wang asking anymore, but this question was even more provocative.
"Well, when the man's penis is inside the man's vagina, making piston-like movements, after some back-and-forth motions, the man will eventually reach orgasm, which is ejaculation."
"Can you demonstrate it for us?"
"This sex is different from the hand-held sex with the teacher; it's difficult to demonstrate."
"Then we can invite a volunteer to come up and demonstrate."
Wang challenged again. "While this demonstration might cause some of you to have erotic fantasies, eroticism and teaching are inherently intertwined. Alright, is there anyone willing to come up and demonstrate?" The students
looked at each other, and suddenly, there was complete silence.
Teacher Chen hadn't expected that when it came to actually doing it, no one dared to try. "Alright then, I'll ask Li's mother to help out. Mrs. Li, please come up here and demonstrate sex for us. Everyone, please clap to encourage her. Mrs. Li wasn't originally here to demonstrate."
Then, my mother, Mrs. Li, came up on stage. My mother was nervous and a little shy, completely unprepared to demonstrate sex with her own son.
"Mrs. Li, please take off your clothes and demonstrate for the other students."
My mother wasn't shy at all. She took off her outer clothes and long skirt, revealing a pure white bra and panties. Then she took off her bra and panties, revealing her C-cup breasts, with light brown nipples. Her pubic hair was sparse but neatly arranged on her mons pubis. She was only wearing 3-inch high-heeled sandals. I had never seen my mother's body before; it was very sexy.
"Dear students, although Ms. Li is Li's mother, she is still very young and has given birth, making her a mature mother. Before demonstrating, I'll briefly explain the different parts of the female body."
The instructor asked my mother to sit on the platform, placing her feet, clad in high-heeled sandals, on the edge of the platform and bending her legs into an M-shape, exposing her labia to the other students.
"Dear students, this is the labia majora, and this is the labia minora and clitoris. Inside the labia minora is a smaller opening, which is the small hole I'm inserting the pen into now. This is the urethra. Many first-timers often mistakenly enter the urethra, causing extreme discomfort for the woman."
My mother displayed her genitals, blushing as she glanced back at me before turning away.
"Next, look below the urethra, there's a larger opening. That's the vagina. The membrane on the surface of the vagina is what's commonly known as the hymen. Oh dear, Li's mother, your hymen is broken, isn't it ? The small, tightly closed hole below is the anus, which is generally only used for defecation."
"Teacher, what do you mean by 'generally'? Isn't the anus only used for defecation?" a boy in the back asked.
"Yes, because some abnormal sexual intercourse uses the anus, that's called anal sex! Only very lewd people do that, it's a perverted thing."
Another boy said, "Can you demonstrate? Can you really insert the penis?"
"That's abnormal sexual behavior, only lewd women do that." The teacher turned to the mother and asked, "Li's mother, would you be willing to demonstrate sexual intercourse with your mother now, and then do anal sex demonstration next week?"
"Sure, as long as it can help these students, and my son is willing to cooperate, I don't object." The mother agreed without thinking.
"Li, are you willing?" Teacher Chen asked me in a slightly sexy tone.
"Teacher Chen, it's okay, I'm willing." Of course, I couldn't resist Teacher Chen's request.
"Well, since the person involved has no objection, then please come over, Li."
I walked to the front of the podium, standing there a little lost, but my eyes were drawn to my mother's vulva. Her light brown labia were slightly damp, extremely beautiful, and my erect penis couldn't help but nod in agreement.
The lecturer pushed me closer to my mother, positioning my glans against her vagina. "Students, please move closer, but don't disturb the two on stage. Find a spot where you can see clearly."
The students crowded around the stage like they were watching a show. Once everyone was in position, the lecturer grabbed my penis, preparing to demonstrate this classroom sex show. "Teacher, is this how sex is done, with the man directly penetrating?"
a student asked. "Generally speaking, there's foreplay before sex, including caressing and oral sex. I've already demonstrated oral sex
for you all," Teacher Chen said. "Then let me demonstrate caressing a woman."
The lecturer held my penis and gently stroked it back and forth. Although I felt a little uncomfortable in front of more than thirty men, it felt really good, so I closed my eyes to enjoy it. At that moment, I felt the lecturer squeeze my penis slightly, and I quickly opened my eyes again.
"Next, I'll demonstrate male caressing and oral sex."
The instructor gestured for me to lower my head, so I did, facing my mother's genitals. "When a man licks a woman's clitoris and labia with his tongue, it's called oral sex."
The instructor nodded, and I licked my mother's labia. At that moment, my mother shuddered as if she'd been electrocuted.
"Due to time constraints, I'll just demonstrate oral sex briefly. Now, everyone, watch how a man has sex with a woman."
The instructor nodded at me again. I raised my erect penis and slowly approached my mother's already wet vagina, slowly, slowly inserting it until the entire penis was inside. At this point, the female instructor gestured for me to pause. "Yes, the action I just demonstrated is sex. Does anyone have any questions?"
"Teacher Chen, Li's penis wasn't fully inserted. Is that okay?"
"Yes, that's because the penis only went to the very end of the vagina. Li's penis is 11 inches long; any further and it would have reached his mother's uterus."
"Is that not okay?" another student asked.
"Yes, that's fine, but it's just a demonstration. You don't need to insert it all the way in," Teacher Chen explained. "How about this, Li, you insert it a little further, until it reaches the uterus, okay?"
"Let me help!" Mom offered, then slowly moved her body, gently swallowing my penis into her vagina. I could feel it passing through the cervix. "Ahhh!" Mom groaned.
"Looks like it's inside the uterus." Teacher Chen began his academic explanation, but I didn't hear a word. My whole body was only focused on the pleasure of my penis thrusting into her uterus. Involuntarily, I thrust into my mother.
"Teacher, what was that 'Ahhh!' sound that you made?" a male student asked, even imitating his mother's moan.
"Oh! That's moaning. When you experience sexual pleasure during intercourse, you make a pleasant sound. But what you just heard was rather vulgar; you could call it 'lewd moaning!'" the teacher explained without any politeness.
"Teacher, can I watch the whole sex act? Also, what is anal sex?"
"Okay, since this class is about to end, let's have Li and his mother demonstrate other sexual acts for us after class."
After saying that, the lecturer gestured to me, so I pulled out my penis from my mother's vagina. Unexpectedly, after nearly fifty minutes of stimulation, just as I pulled out my penis, yes, I ejaculated. Amid the gasps of the other students, I ejaculated the unfinished semen, shooting it all over my mother's belly.
Perhaps it was unexpected, but Ms. Chen suddenly fell silent, staring at the semen I had ejaculated on Wang's stomach for a long, long time, until the next student asked… "Teacher, is this ejaculation?"
"Uh, yes, although today's sex demonstration wasn't a complete set, Li was probably affected by everyone's stimulation, so he ejaculated as he withdrew his penis. This is semen, that's right."
The lecturer flicked the semen away with her finger. "Students, if these few drops of semen were ejaculated onto a woman's vagina, it could potentially cause pregnancy. So, before you decide to have a baby, you must wear a condom during sex to avoid causing a pregnancy while enjoying yourself." My mother looked
at me, her blushing face and slightly hazy eyes were extremely beautiful. I couldn't help but reach out and grab her feet, wanting to caress her passionately, until the female lecturer's soft cough startled me back to reality.
"That's about time. You can take turns touching my semen, but be careful to wash your hands afterwards."
This absurd "live dissection" class ended amidst the class's uproarious laughter and the endless stream of students touching my semen.
This happened when I was in fifth grade. That June, after the final exams, I was idle at school. One day, Ms. Chen asked if I could help tutor a junior student. Of course, I said no problem, because Ms. Chen was the most beautiful woman in the school, still stunning even though she was married. Ms. Chen asked me to bring my mother too, saying she could treat us to dinner after class as a thank you for my help, so I brought my 38-year-old mother along.
My mother's name was Huang Meilian, she was 38 years old at the time, 5 feet 2 inches tall, with measurements of 36C-25-34. I was 17 years old then, 6 feet tall, and weighed 120 pounds, one of the most handsome men in the school, so it wasn't surprising that the teacher asked me for help, and I was happy to help Ms. Chen.
That day, I arrived at the small room next to the classroom very early in the morning, and my mother came with me.
"Li, you're here really early; did you bring your student ID?"
"Yes."
After handing over the student ID to Teacher Chen, she took a set of hospital clothes from the drawer and gave them to me. "Turn left at the end of the door, there's a changing room on your right. Take off your clothes and pants and change into this hospital gown."
Looking at the "set" of clothes in her hand, it was at most just a piece of cloth with two sleeves sewn on.
After taking off my outer clothes and pants, I hesitated whether I should also take off my underwear. Two years in the army had indeed made me more thin-skinned, so I decided to wear my underwear and put on the hospital gown before returning to the office.
"Li, did you take off your underwear too?"
"Ah, no."
"Then take it off."
"Okay."
It was the first time I'd taken off my underwear in front of Teacher Chen without doing anything. After taking it off, I couldn't help but tug at my shirt, as if worried that Teacher Chen would see my private parts. Teacher Chen glanced down at my lower body slightly, then looked back at the desk and continued typing. I, on the other hand, felt like I was sitting on pins and needles, fidgeting and constantly tugging at my shirt. Finally, Teacher Chen stood up, nodded, and gestured for me to follow her, leading me into an empty room.
"Li, please wait here for a moment."
"Okay."
Then she opened the door and went into the adjacent classroom. I could hear many people whispering inside, very softly.
"Dear students, in order to help you get into the swing of things as soon as possible, the school has arranged for some senior students to help you with a live dissection."
The senior students must be referring to me? Live dissection? I was filled with endless confusion.
"Vivisection not only explains the organs of the human body, but also hopes that you students will gain a deeper understanding of the human body through touch, sight, smell, and even hearing."
For some reason, I had a vague feeling that something was wrong.
"Well then, let's welcome Li from the senior class with a humble and eager-to-learn attitude."
At this moment, Teacher Chen opened the door again. "Li, it's alright, please come to the front of the classroom."
It turned out that she had just entered a classroom. When I entered the classroom, I saw about thirty male students sitting in their seats (because I attended an all-boys school). They were all craning their necks to look at me, their eyes seemingly shining.
"Yes, everyone, please treat Li as a living organism for now, and the class will proceed more smoothly."
Teacher Chen then turned to look at me. "Li, please take off your patient gown."
Uh, if I take off this patient gown, won't I be naked in front of more than thirty men? The male students began to whisper among themselves when they heard the lecturer say this.
"Class, please raise your hand if you have any questions. Whispering like this is very impolite to me, and to this living, breathing person on stage—uh, I mean, Li."
He continued to look at me, seemingly waiting for my next move. I reluctantly removed the cloth covering my sleeves. After Professor Chen took it, all eyes were on me, naked in front of the podium.
"Yes, what is presented before you is a male body. You can clearly see that the biggest difference between a man's body and your own is that he lacks breasts; instead, he has thicker muscles. And the lower body..."
The professor gestured for me to raise my hands covering my genitals. "We can see that the male lower body consists of the penis and the scrotum."
This was the first time I had been naked in front of men, and in front of more than thirty men at once.
"Actually, you'll have many opportunities to see male bodies after graduation, whether it's male patients or your boyfriends, but none of those will be like today, where you can learn about the different parts of a man. Okay, does anyone have any questions?"
"Teacher..."
A student raised his hand. "Um, Wang, please go ahead."
"I'd like to ask, how do men have sex?"
"Very good question. Although it's not part of today's male anatomy lesson, I'll explain it to you anyway. Sexual intercourse occurs when the male sex organ, the penis, is inserted into the male vagina."
"But how can this limp penis be inserted into a vagina?"
The speaker was Wang, who had just raised his hand, his slightly cunning eyes looking at me.
"Yes, today is Li's first time demonstrating a live specimen, so he's a little nervous. A normal male penis will become erect due to blood flow after stimulation, and once erect, it can be inserted into the male body." "
Teacher, could you please use a live specimen? I mean, could you please have Li demonstrate an erection?" It was Wang who spoke again.
"It's probably impossible for Li to get an erection naturally right now, so I'll give him some stimulation. Everyone should approach today's live anatomy lesson with caution, don't think of it as a pornographic demonstration."
Saying this, the lecturer turned to face me, nodded, and then touched my penis.
"Classmates, you can all get a little closer to observe the changes in the live penis today."
At this moment, the lecturer held my penis, and the students below all moved closer, as if looking at a very interesting little animal. My penis, which had been shrunken due to nervousness, unexpectedly began to react and gradually became erect under the watchful eyes of more than thirty young men and the touch of the beautiful female lecturer.
"Wow, it's really hard!"
Under the female lecturer's caresses, my penis went from being shrunken to erect.
"Classmates, this is a male penis in an excited state."
"Teacher, can we touch it?"
It was Wang again who asked. "Okay, today we hope that you will thoroughly understand the structure of the male body through different sensations. Now, according to the seating order, remember to be gentle when touching it, as the male penis can be quite sensitive at times."
The boys lined up neatly in front of me, waiting to touch my penis. So this is what the teaching model's job is.
At this moment, the teacher removed the hand that had just held my penis. "Then everyone, please take turns touching the male penis and scrotum."
The first student slowly extended his right hand, touched the penis with his fingers, and then withdrew it, causing the other students in the back to burst into laughter. The second one was Wang, who had asked many questions earlier. She reached out and grabbed my penis without hesitation, and even moved it back and forth a few times. This action was just like the action I take when masturbating, except that this hand was not my hand, but the hand of a very young girl with a pretty face.
"Teacher, you just said we can experience a man's body through touch and smell. Can I smell a male penis?"
"Hmm, okay, but remember to be careful."
Wang looked up, gave me a sly look, and then lowered his head to smell my penis.
"Teacher, a male body doesn't have much of a smell. I wonder what it tastes like."
Before the lecturer could answer, Wang actually put my penis in his mouth, sucked it twice, and then slipped off the stage. The other students, some shyly touched it, some held the whole penis and stroked it slightly like Wang, and some bolder ones even lowered their heads to smell it. But no one dared to open their mouths to suck my penis like Wang did.
Finally, all thirty-odd male students in the class had taken turns playing with my penis. At this point, my penis was extremely erect due to the great stimulation, and the tip of the glans even secreted a little prostate fluid, making it wet.
"Teacher, you just mentioned male-male sex, could you demonstrate?"
The questioner was the same student, Wang. "As for male-female sex, it's inconvenient for the teacher to demonstrate in class. Let
's assume this is a woman's vagina." The lecturer then circled her left hand. "This is how a male penis is inserted."
The lecturer brought her circled left hand close to my penis and began to stroke it back and forth. "However, usually, sex is initiated by the male, who performs the piston-like motion after penetration." "
Then, teacher, could you please have student Li demonstrate, pretending to have sex with the teacher, I mean, with the teacher's hand, and show us?"
The female lecturer glanced at me and nodded, indicating that I should demonstrate. Good heavens, didn't this female lecturer know that besides masturbating a few times, I'm actually a complete virgin? I had no choice but to follow the scenes from porn in my head and pretend to have sex with the female lecturer's hand. Sigh, I never thought that my first time as a virgin would be so unromantic, openly having sex with the left hand of a seemingly unattractive lecturer in front of more than thirty male students.
"Class, this is what sex is all about. But real sex isn't done with a man's hand; it's done through the vagina. Any other questions?"
"Teacher, how does a man ejaculate?"
Finally, it wasn't Wang asking anymore, but this question was even more provocative.
"Well, when the man's penis is inside the man's vagina, making piston-like movements, after some back-and-forth motions, the man will eventually reach orgasm, which is ejaculation."
"Can you demonstrate it for us?"
"This sex is different from the hand-held sex with the teacher; it's difficult to demonstrate."
"Then we can invite a volunteer to come up and demonstrate."
Wang challenged again. "While this demonstration might cause some of you to have erotic fantasies, eroticism and teaching are inherently intertwined. Alright, is there anyone willing to come up and demonstrate?" The students
looked at each other, and suddenly, there was complete silence.
Teacher Chen hadn't expected that when it came to actually doing it, no one dared to try. "Alright then, I'll ask Li's mother to help out. Mrs. Li, please come up here and demonstrate sex for us. Everyone, please clap to encourage her. Mrs. Li wasn't originally here to demonstrate."
Then, my mother, Mrs. Li, came up on stage. My mother was nervous and a little shy, completely unprepared to demonstrate sex with her own son.
"Mrs. Li, please take off your clothes and demonstrate for the other students."
My mother wasn't shy at all. She took off her outer clothes and long skirt, revealing a pure white bra and panties. Then she took off her bra and panties, revealing her C-cup breasts, with light brown nipples. Her pubic hair was sparse but neatly arranged on her mons pubis. She was only wearing 3-inch high-heeled sandals. I had never seen my mother's body before; it was very sexy.
"Dear students, although Ms. Li is Li's mother, she is still very young and has given birth, making her a mature mother. Before demonstrating, I'll briefly explain the different parts of the female body."
The instructor asked my mother to sit on the platform, placing her feet, clad in high-heeled sandals, on the edge of the platform and bending her legs into an M-shape, exposing her labia to the other students.
"Dear students, this is the labia majora, and this is the labia minora and clitoris. Inside the labia minora is a smaller opening, which is the small hole I'm inserting the pen into now. This is the urethra. Many first-timers often mistakenly enter the urethra, causing extreme discomfort for the woman."
My mother displayed her genitals, blushing as she glanced back at me before turning away.
"Next, look below the urethra, there's a larger opening. That's the vagina. The vaginal wall has a thin membrane, commonly known as the hymen. Oh dear, Li's hymen is broken, isn't it? The small, tightly closed hole below is the anus, which is generally only used for defecation."
"Teacher, what do you mean by 'generally'? Isn't the anus only used for defecation?" a boy in the back asked.
"Yes, because some abnormal sexual intercourse uses the anus, that's called anal sex! Only very lewd people do it, it's a perverted thing."
Another boy said, "Can you demonstrate? Can you really insert the penis?"
"That's abnormal sexual behavior, only lewd women do it." The teacher turned to the mother and asked, "Li's mother, would you be willing to demonstrate sexual intercourse with your mother now, and then do anal sex demonstration next week?"
"Sure, as long as it can help these students, and my son is willing to cooperate, I don't object." The mother agreed without thinking.
"Li, are you willing?" Teacher Chen asked me in a slightly sexy tone.
"It's okay, Teacher Chen, I'm willing." Of course, I couldn't resist Teacher Chen's request.
"Well, since the person involved has no objection, then please come over, Li."
I walked to the front of the podium, standing there a little lost, but my eyes were drawn to my mother's vulva. Her light brown labia were slightly damp, extremely beautiful, and my erect penis couldn't help but nod in agreement.
The lecturer pushed me closer to my mother, positioning my glans against her vagina. "Students, please move closer, but don't disturb the two on stage. Find a spot where you can see clearly."
The students crowded around the stage like they were watching a show. Once everyone was in position, the lecturer grabbed my penis, preparing to demonstrate this classroom sex show. "Teacher, is this how sex is done, with the man directly penetrating?"
a student asked. "Generally speaking, there's foreplay before sex, including caressing and oral sex. I've already demonstrated oral sex
for you all," Teacher Chen said. "Then let me demonstrate caressing a woman."
The lecturer held my penis and gently stroked it back and forth. Although I felt a little uncomfortable in front of more than thirty men, it felt really good, so I closed my eyes to enjoy it. At that moment, I felt the lecturer squeeze my penis slightly, and I quickly opened my eyes again.
"Next, I'll demonstrate male caressing and oral sex."
The instructor gestured for me to lower my head, so I did, facing my mother's genitals. "When a man licks a woman's clitoris and labia with his tongue, it's called oral sex."
The instructor nodded, and I licked my mother's labia. At that moment, my mother shuddered as if she'd been electrocuted.
"Due to time constraints, I'll just demonstrate oral sex briefly. Now, everyone, watch how a man has sex with a woman."
The instructor nodded at me again. I raised my erect penis and slowly approached my mother's already wet vagina, slowly, slowly inserting it until the entire penis was inside. At this point, the female instructor gestured for me to pause. "Yes, the action I just demonstrated is sex. Does anyone have any questions?"
"Teacher Chen, Li's penis wasn't fully inserted. Is that okay?"
"Yes, that's because the penis only went to the very end of the vagina. Li's penis is 11 inches long; any further and it would have reached his mother's uterus."
"Is that not okay?" another student asked.
"Yes, but this is just a demonstration. You don't need to insert it all the way in," Teacher Chen explained. "How about this, Li, you insert it a little further, until it reaches the uterus, okay?"
"Let me help!" Mom volunteered, then slowly moved her body, gently swallowing my penis into her vagina. I could feel my penis passing through the cervix. "Ahhh!" Mom groaned.
"It seems it has entered the uterus." Teacher Chen began his academic explanation, but I didn't hear a word. My whole body was only focused on the pleasure of my penis thrusting into my uterus. Involuntarily, I thrust into my mother.
"Teacher, what was that 'Ahhh!' sound that you made?" a male student asked, even imitating his mother's groan.
"Oh! That's moaning. When you experience sexual pleasure during intercourse, you make a pleasant sound, but what you just heard was rather vulgar. You could call it 'lewd moaning!'" The teacher explained without any politeness.
"Teacher, can I watch the whole sex act? Also, what is anal sex?"
"Okay, since this class is about to end, let's have Li and his mother demonstrate other sexual acts for us after class."
After saying that, the lecturer gestured to me, so I pulled out my penis from my mother's vagina. Unexpectedly, after nearly fifty minutes of stimulation, just as I pulled out my penis, yes, I ejaculated. Amid the gasps of the other students, I ejaculated the unfinished semen, shooting it all over my mother's belly.
Perhaps it was unexpected, but Ms. Chen suddenly fell silent, staring at the semen I had ejaculated on Wang's stomach for a long, long time, until the next student asked… "Teacher, is this ejaculation?"
"Uh, yes, although today's sex demonstration wasn't a complete set, Li was probably affected by everyone's stimulation, so he ejaculated as he withdrew his penis. This is semen, that's right."
The lecturer flicked the semen away with her finger. "Students, if these few drops of semen were ejaculated onto a woman's vagina, it could potentially cause pregnancy. So, before you decide to have a baby, you must wear a condom during sex to avoid causing a pregnancy while enjoying yourself." My mother looked
at me, her blushing face and slightly hazy eyes were extremely beautiful. I couldn't help but reach out and grab her feet, wanting to caress her passionately, until the female lecturer's soft cough startled me back to reality.
"That's about time. You can take turns touching my semen, but be careful to wash your hands afterwards."
Amidst the whole class's uproarious laughter and the endless rush of people touching my semen, this absurd "live dissection" class came to an end.

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My mother and I demonstrate sexual intercourse.

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