sperm cells

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During that biology lab, the teacher said she wanted to examine male sperm cells! [I don't know what the teacher was thinking
, but she wouldn't let us bring them from home, saying the sperm would be dead by then, and we had to come to school to collect them. She even
brought some pornographic magazines from her husband's place.

Every boy in the class was passing the buck, no one wanted to go. My group was the worst off because I
was the only guy in my group [three diagonal lines], so I had to go. With four girls watching me like that,
how could I not go? One of them was the group leader, her name was Lingxuan. She was
the type of girl who got good grades but was very talkative and nosy, and she wore thick-rimmed black glasses.

She told me to hurry up and not cause trouble for the group. I thought to myself, "This isn't something that can be rushed
, sis! Why don't you do it yourself!"

I still grumbled and took my book to the bathroom. When I got there, I was dumbfounded!] The restroom was full, so I had to
go to the one farther from the lab. Once inside, I opened a book, and immediately realized that porn was far more exciting than books
; books held no sexual interest for me.

The restroom was unusually quiet, a little eerie because no one was around. Then a couple entered. The man said, "
There shouldn't be anyone here, right?"

The woman replied, "Bringing someone here, you're such a bad person!" I immediately recognized them as Ahua and Mengxuan from my class. They
chose the stall next to mine, and I didn't dare make a sound. They were incredibly bold, making love right there next door. Mengxuan
kept moaning. Since they were a couple, they could use this method to collect sperm (menstrual blood),

while I was risking my life to go to the West! But this was a good opportunity to collect
sperm. If only I could see it! But even crouching down, all I could see were the legs of a four-cornered beast. I had to rely on
my imagination. What excited me was that they were right next door; the wooden walls were vibrating and pounding, showing how
intense it was.

I was already erect, and I envied them. The wall was shaking more and more violently; it seemed Ah Hua was almost done. Meng
Xuan gasped, "Ah... Hua... no... ah... don't do that anymore... today... is my... dangerous period...
I can't do this... I'll... get pregnant... ah... I'll use my mouth... to help you... please stop... it's so bad..."

Meng Xuan's moans were so sexy! She was beautiful and had a curvaceous figure. The wall shook a couple more times before
stopping, and I heard a slurping sound. I guessed Meng Xuan was giving him oral sex! I didn't dare make a sound
. After a while, there was a sudden noise.

It startled the three people in the bathroom. It was the group leader, Ling Xuan, who shouted, "Jin Cheng! Are you done yet?
We've been waiting for so long!"

Her shout startled Ah Hua and Meng Xuan even more (they ejaculated). I pretended not to know anything and replied
, "Not yet! Your shout made me go back to it!" (It really went soft.)

The two of them realized the voice was coming from next door. Just now... The two of them didn't make a sound. Lingxuan said
again, "What should we do? The teacher is urging us!"

I said, "There's no other way! Come in and help me."

Lingxuan paused for a moment and replied, "How can I help?" The three of them were a little surprised and wondered
why I would say such a thing.

I said, "Come in first!"

I opened the door and tried to pull Lingxuan in, but she was shy. I deliberately spoke loudly, "
There's no what are you afraid of!"

The bathroom wasn't too crowded, and there was still room to maneuver. Lingxuan said, "Let's make a deal first: you absolutely
cannot touch my body, or I'll sue you for sexual harassment."

I listened carefully to Ahua and Mengxuan next to me. They obviously wanted to stay and hear what we were going to do,
otherwise they would have taken this opportunity to go back to the lab. I didn't hide anything. Lingxuan said, "Okay! So
how ?"

I joked, "Can I see your naked body?"

Lingxuan slapped me, "Vulgar!"

The slap wasn't very hard. I laughed and said, "Just kidding!"

Lingxuan said a little seriously, "Hurry up!"

I thought for a moment and said, "Then you can pose in some sexy positions!"

Lingxuan asked, "How? I don't know how!" I took out some pornographic magazines for her to refer to.

When Lingxuan saw the naked men and women in the book, she blushed with embarrassment. I said, "Hey! What's wrong? Hurry up!
" It was the first time Lingxuan had been forced to pose in such a seductive way, and she became shy on the spot, but she had no choice but to do it. Although
her movements were clumsy, she still managed to strike a pose.

Actually, if you look closely, Lingxuan is quite pretty; she just doesn't know how to dress herself. Her beautiful face was covered by her glasses
. I said, "This isn't sexy enough.

Unbutton your blouse a little." Lingxuan blushed and unbuttoned it one button. I became firm and said, "Not enough! Not enough! Unbutton it another button." Lingxuan
did as .

You could already see her cleavage. I said, "Just one more button." Lingxuan obediently unbuttoned it another button. I don't
know why, but Lingxuan, who is usually very fierce, suddenly became shy and timid. I like girls like her.
It was as if our roles had been reversed at that moment, and I was in control.

I saw Lingxuan's bra; she was wearing a plain white bra. Her breasts were surprisingly large;
she usually didn't cover them up at all. They looked at least a D cup or larger. I joked, "You've taken good care of them!
" Lingxuan blushed and lowered her head. Looking at her large breasts, I was already very aroused.

I pulled out my penis and started thrusting! Lingxuan stared at my penis with one eye open and one eye closed, seemingly a little frightened
. I guessed she had never seen a man's genitals before, and I also guessed she was still a virgin. I said, "Squeeze
out your cleavage, it'll look even better!" She timidly bent down and squeezed out a large cleavage.

I was so excited, but the more excited I got, the harder it was for me to ejaculate. My penis was too hard, and it took a while before I came out.
My hands were getting sore. I said, "This won't work. My hands are already sore before I even come out. Can you help me?"

She was startled and said, "I don't know how!"

I said, "Just hold it tightly and stroke it back and forth like I did before! Come on!"

She squatted down, touched it with her hand in fear, and then pulled it back. I grabbed her hand and let her touch my penis. I said
, "Don't be afraid! Just take good care of it." Lingxuan slowly grabbed it and started stroking it. At this moment
, Lingxuan didn't know that her breasts were almost exposed.

From my angle, I could see everything clearly: enormous breasts, barely contained by her bra. And those
girl's hands were just different—so smooth and tender, like a young girl's vulva. I was almost overwhelmed, but I held back,
determined to take advantage of her one last time.

There wouldn't be another chance like this. I deliberately pulled her hand away and said, "Looks like it's still not working
!"

Lingxuan panicked, "What should we do?"

I said, "I have a way that will definitely work."

Lingxuan: "What is it?" Me: "I'm too embarrassed to say!"

Lingxuan said, "Tell me! What time is it?"

Me: "Then promise me you'll help me."

Lingxuan said, "Okay! Okay!"

Afraid of making her angry, I stammered, "You…suck…my…mouth."

Lingxuan hesitated for a moment, then said seriously, "Will that work?" I thought to myself, this woman is so easy to fool
!

I showed her some pornographic magazines and told her that it was only effective if she swallowed and spat quickly like this. Lingxuan nodded, 　　seemingly understanding. So, her first time was about to be given to this stinky man like me. She was still a little scared and
slightly opened her mouth. 　　I said, "Open it wider, otherwise it won't go in. Remember! Once it's in, you have to hold it in properly!" Lingxuan nodded . 　　She slowly tried to swallow my penis. Although it was already in her mouth, she hadn't closed it yet , and I could already feel the heat inside. When she completely took it in, that moment was truly amazing! Although she couldn't swallow me whole, the wet, warm, sticky, narrow flesh, combined with her constantly moving tongue, was incredibly exciting. People say oral sex is more pleasurable than intercourse, and it seems that's true. 　　I said, "Move! Otherwise, it's useless!" Lingxuan's swallowing and spitting, her sticky saliva, filled my entire penis. Because of the lubrication, my movements became faster and faster. I couldn't hold back any longer. I grabbed her head and started moving my hips, thrusting back and forth violently. Lingxuan was startled by my actions and tried to escape, but I held her tightly . 　　In just a few thrusts, I ejaculated into her mouth. She choked a little and quickly spat it out. I got her a container to put it in. As soon as she spat it out, she said, "What are you doing!" 　　I said, "This is a normal reaction for a man to ejaculate!" She stared blankly at the semen she had spat out, as if it were the first time she had ever seen it. 　　The toilet reeked of a fishy stench, and quite a lot of urine came out. After we got dressed, we rushed back to the classroom. Lingxuan specifically reminded me, "Don't tell anyone about what happened today!" I promised. Not long after we got back to the classroom, Ahua and the others came in. They got scolded by the teacher. Later, when they examined my sperm cells, they found that they were swimming quite fast. I really have to thank Lingxuan for her help. We smiled at each other.

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