Biology Lesson

By Aldric

Copyright 2026 by Aldric
pietar_the_fearless@yahoo.com all rights reserved

[2,941 words]


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This story is intended for ADULTS ONLY. It contains depictions of sexual activity involving minors. If you are not of a legal age in your locality to view such material or if such material does not appeal to you, do not read further, and do not save this story.

Comments may be sent to pietar_the_fearless@yahoo.com . Note that the underscores (between pietar, the, and fearless) are part of the name and must be included.

This story depicts minors in unusual conditions that may include unprotected, unsafe sex or extreme humiliation. Obviously, this does not describe real life and should not be taken as such. In the real world, behaviors as described in the story are not acceptable, tolerated, or legal. The reader should never confuse the difference between fiction and real life. This story is fictional.

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Biology Lesson

For as late in the year as it was, it was delightful. Normally, it would be far too cold to sit on the patio wearing nothing but boxers and shorts. The normal high this close to Halloween was about 55 F. But today, the temperature was in the low 70’s, and with no wind at all, it was just perfect. Even the mosquitoes were gone. Just a few flies, nothing more to disturb a day off from school on a Friday.

Now, in the peace and quiet of my back porch, I was nearly dozing. Then, without any warning, I heard a noise followed immediately by strips of painter’s tape being wrapped round both wrists and secured to the arm rests of the chaise lounge. I opened my eyes.

Hope Poynton was on my right, and her sister, Sue, to the left. Hope was twelve, Sue had just turned eleven.

“Let me go,” I demanded.

Hope ignored me, and Sue just laughed. Hope unsnapped my shorts, and her sister began tickling my sides, making me lift up enough for Hope to work my shorts and boxers down to my knees. From there, they were pulled over my feet. Then the girls used more of the blue tape to secure my ankles to the bottom of the chaise lounge.

“Now watch, and you’ll see the difference between flaccid and erect,” Hope said to her sister. They both stood next to me, their eyes focused on my middle.

I wanted to yell, but I didn’t want to attract the attention of my sister, who was in the house with Cheryl Gmacs, her best friend. They were both fifteen, a year older than me. “What, what, ….” I couldn’t even think of anything to say.

“Sue learned about puberty in school this week, but she was confused about boys. You’re going to show her what an erection looks like.” She turned to Sue for a moment. “See? It is already getting longer and starting to rise. That means it is filling with blood.”

I was indeed getting a boner. I pulled my arms and legs with all my might, but the four wraps of the painter’s tape held me secure.

“What is going on?” Jessie asked as she and Cheryl came out onto the porch.

“Sue learned about puberty in school this week, but she didn’t understand about boys and their private parts.,” Hope stated, as if using me as a teaching device was perfectly normal.

“Oh, I remember that class,” Cheryl stated. “Sixth grade, right?”

“Yeah,” Sue responded without taking her eyes off my middle. “Hey, now I can see his testaments!”

“Testicles,” Jessie corrected. “Boys call them balls. What you are seeing is his sack. The balls are inside. Don’t squeeze them, handle them very gently. They hurt a lot if you put any pressure on them.”

“Don’t encourage them,” I yelled. I couldn’t believe my older sister was standing out there allowing the two younger girls to learn all about my anatomy. “Make them let me go!”

“Oh, you’re not being hurt. They are just curious. They’ve probably never seen those parts of a boy before.”

As my sister spoke to me, Sue leaned over and gently lifted my balls. “I can feel them,” she said. “They aren’t round like I thought. ‘They’re oval.” Without releasing my balls, she used her left hand to feel my dick. “And his penis doesn’t feel anything like I thought it would. The skin slides easily, but it is hard beyond the skin.”

“Keep doing what you are doing and you be able to see and feel his orgasm,” Sheryl told her. “Your teacher talked about orgasms, didn’t she?”

“Yeah.” For the first time since they’d stripped me naked, Sue looked at my sister. “Is it okay if I do that? I really want to see what it means.”

“Sure, he’ll enjoy it,” Jessie said.

I immediately realized why she hadn’t stopped the girls. She and Cheryl were as interested in this as the younger girls were! They wanted to see me get hard, and watch me cum. This was insane. I struggled again, but as before, I could not get free.

Sue’s hand on my dick was causing me to get closer and closer to the inevitable ending. My body began to stiffen, and then my dick erupted. But only for two shots! Sue let go, leaving me unfinished and frustrated.

She jumped back, surprised and shocked. “That won’t make me get pregnant, will it?”

“No,” Jessie laughed. “Not unless it got deep inside your vagina. But he enjoyed it, up until you let go before he was done. Let him cool off for a few minutes, and then you can do it again. But as soon as you see his body tense up, stop and let go. Do that five or six times and he’ll agree to be your slave.” She turned to Cheryl. “Let’s go back inside and let the girls learn more about boys.”

She turned back as she was leaving. “I’ll be right back with some sun block. If you’re going to learn more about boys, you’ll need to cover his middle to make sure he doesn’t get a sunburn.”

Before I could even guess at what I could say, she and Cheryl were gone. My sister came back out a minute later and put a container of sun block on the table before going back inside.

“Should we take some pictures in case other girls didn’t know what boys looked like?” Sue asked her sister.

“No, you don’t want a picture of him naked on your phone. That could lead to too many problems. But you and Vicky Anderson are both in the same classroom, aren’t you? Call her and invite her over. Maybe invite Theresa too. She is fourteen, the same as Leo. I’ll bet she’d enjoy seeing him.”

“No!” I yelled as Sue pulled out her phone. “I’ll tell if you do.” Sue stepped away from me far enough that I couldn’t hear her on the phone. The last thing I needed was for another girl of eleven seeing me, especially if she came with her sister, who was my age!

“You tell, and we’ll say that you offered to show her what she didn’t understand in class,” Hope said sternly. “Once we remove the tape, there will be no evidence that we stripped you. And you’ll have to explain how two girls, both younger than you, managed to get you naked and make you ejaculate.”

I thought about it and realized that she was right. Nobody would believe that two younger girls managed to strip me naked. And that would mean they would believe that I planned the whole thing.

Ten minutes later, I had four girls staring at me. Two who were eleven, one thirteen, and one fourteen. Cum had leaked out of my dick after the failed ejaculation, leaving a small puddle on my belly.

Theresa was laughing and pointing. “Leo Smith. Naked. I never thought I’d see the day. I came close back in fifth grade when Lenny Wilkerson pantsed you, but he never got your whitey-tighties down. But that’s okay, now that you’re older, you are a lot more interesting.”

That had been four years ago. I hadn’t even known that any girl had seen me in my briefs. My shorts were only down for seconds before I pulled free from Lenny and got them pulled back up. Theresa was the same age as me, and that made being tied up naked even worse.

“I guess we have to clean that up,” Hope said, pointing to the small puddle of cum on my belly. She grabbed my boxers and used them to clean it up. “Now we have to apply some sun block. Who wants to do it?”

Sue and Vicky both did, and they worked together, spreading the cooling cream over my exposed area. When it came to doing my dick, Hope stopped them and explained what to do.

“Hope already had a turn doing this, so this time it will be Vicky. Apply the sun block by sliding your hand up and down his penis very slowly. When you see his body stiffen, stop.”

Vicky looked unsure, and turned to look at her sister. Theresa laughed again. “He’ll like it. Go ahead and see what a penis feels like. In fact, I’ve never touched one.”

She reached out and wrapped her hand around my dick, which immediately began to harden. She held it for a few more seconds before releasing me and her sister took over.

At first, the sun block on her palm felt good. But it was too damn good. I got fully hard, and after just a few strokes I was about to cum again. Hope and Theresa both yelled at her to stop, and once her hand was removed from my penis, it jerked a few times and a bit of cum leaked out the piss hole. But it wasn’t a jerk off. I was still needing an ending.

It got worse and worse. They took turns, all four of them getting me right to the brink of shooting and then stopping. I was close to tears from the frustration and need.

My sister and her friend Cheryl came out just as Theresa finished her turn.

“He looks pretty desperate,” Jessie said. She looked down at me, this time looking at my face. “If Sue or Vicky have any more questions, you’ll help to answer them? Even if it means letting them see and touch you while you are naked?”

“Please,” was all I could say. But she stared at me, waiting for an answer. Finally, I was forced to say that I would help them to learn, even if it meant being naked for them again.

“Okay. Cut his right hand loose,” Jessie said to Hope. To me, she said to show them how I do it.

The idea of jacking off with six girls watching was beyond belief, but I needed to do it so bad that I did. It only took less than a minute before I had one of the best cums I’d ever had before. My dick juice left drops up and down my belly. When it ended, I was exhausted, breathing deeply.

Theresa pulled my sister to the side and had a conversation. I became aware that it was about me when they both looked at me and laughed. I reached around and tried to tear the tape on my left wrist, but before I could even begin to get if off, my right arm was pulled back and more of the painter’s tape was applied to hold it to the arm rest. I saw Theresa on her phone, making a call to someone.

“Girls, I hope my brother answered any questions you have. If you think up more, let me know and I’ll make sure he is available to answer them. I think it goes without saying that you don’t say anything to anybody about this biology lesson.”

Hope, Sue, and Vicky took a last look at me and left. Theresa stayed behind, along with my sister and Cheryl. Now what, I wondered. How many girls my age did Theresa invite over to see me?

“Make sure it doesn’t go too far,” my sister said to Theresa. “And no pictures.” She and Cheryl took a last look at me and returned to the house.

“Who did you invite this time?” I asked, trying hard to keep my voice civil. The last thing I wanted to do now was to piss Theresa off.

“Lenny Wilkerson,” Theresa said with a smile. “And the girl who told him to pants you that day. “Gale North.”

Shit, I said to myself. Another girl in my grade was about to see me naked. Even after the most satisfying orgasm of my life, I felt my dick begin to stand up again.

All too soon, the back door opened and the two of them came out of the house. I suddenly realized that my belly and chest was covered in cum.

Gale was very interested. Lenny not so much. He actually blushed. But he did look. I knew he was comparing his size to mine. Only he would know if there was a difference. I’d never seen him naked, let alone hard.

“I wanted so much to be your girl friend back when we were ten,” Gale began. “I would have loved to play games where both of us ended up naked. But you rejected me. That’s why I told Lenny I’d let him see me if he got you naked. He failed that day, but we’ve had some fun since then. But now! Now I get to see you all grown up and erect. And is that semen on your belly?”

I didn’t know if she expected an answer, but I was too ashamed to talk.

“I’m glad I ended up with you,” she said, looking at Lenny. “Now that I can compare the two of you. You’re a lot bigger.”

Lenny blushed, but didn’t say a word. He was still blushing, and he looked to me like he’d like to be anywhere but here.

Gale stared at my dick. She touched it, laughing as it jerked like crazy. “I’ll bet you’d love it if I made you shoot, but I’m not going to do that. I finally got to see you, so I’m going to leave. Lenny will release you, but I think he’s going to demand something first. You’d better do what he wants because three more girls from our grade are on their way here.” She flicked my dick once more with her finger, giggling. And then she turned and left.

“I’m not going to demand anything,” Lenny said once she was gone. He pulled out a pocket knife. “She thinks I want a blowjob. I kind of do, but I’m not going to make you give me one.” He unfolded the blade and pushed it under the tape on my right wrist as he continued talking.

“I think the girls she said are coming are going to be here in a minute or so. She wants them to be able to see both of us naked, and to watch you suck me off. I’m not that interested.”

He’d already cut the left wrist free and was now working on my ankles.

“Why do you hang out with her?” I asked. “She’s a bully, and she’s using you.”

“I know. But it comes with fringe benefits. Three times now I’ve been on her bed next to her with both of us naked. She jerks me off, and I, uh, I’ve had fingers inside her.”

Free from the tape, I quickly got up and used my boxers to wipe myself clean. Then I pulled my shorts on. Lenny was right, the girls showed up seconds after I snapped the snap on my shorts. There were three of them, all the same age as Lenny and me. They looked disappointed.

“Sorry girls,” Lenny said. Without another word, he quickly left my yard. The three girls looked at me. “Any chance you’d let us see you naked?” Mia Blackmore asked. “Gale said we’d get to see you and Lenny.”

“No, I’m not stripping for you.” And then I had an idea. “Unless you also get naked.” I looked at the other two girls and added, “Same deal with both of you. You want to see me? Well, I want to see you. Do any of you dare?”

I kind of felt like Mia might have been brave enough if the other two girls weren’t there. But they declined, and the three of them left together. I knew I’d always wonder if a different ending might have happened if the girls had come one at a time.

I gathered up the four rings of tape and my boxers and went into the house. I did my best to ignore the almost silent giggles from my sister and Cheryl as I went to my room and closed and locked the door. I jacked off again, thinking about how close I’d come to seeing girls naked. I tried to picture Gale, but even in my mind, Lenny was there next to her. Fingering her as she stroked his dick. He was bigger than me even in my own imaginary picture.

The weather changed to normal the next week. Laying out on the patio in shorts was no longer advised. Hope and Sue Poynton showed up with two other girls who I assumed were eleven. They said they had questions.

“Ask your teacher,” I said in a rather rude tone. “I’m not going to help you.”

They left, disappointed, and I was nervous for several days that they’d seek some kind of revenge. But nothing happened. There were several girls in my grade who I’m sure had been given a good description of what I looked like based on how they looked at my groin instead of my face, but none of them said anything about me being naked.

I did pass Gale West in the hall. Lenny was not with her. Instead, she and Nick Sanders were hand-in-hand. I noticed that his pants were pushed out in front. I’m pretty sure he had a boner. Later I saw Lenny. He said she broke up with him as soon as the three girls called her to say they didn’t get to see me or him naked. He didn’t seem to mind all that much.

The End.






   
   
   
   
   
   
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