Biology Lesson, Pt 2

Read Part 1 here. This sequel is a result of our poll a few weeks back - thanks for your votes! 

About a week after Mr. Christianson’s biology lesson, he paired up Dan DeMarco and I as study partners. We had to do a project outside of school hours, which meant Dan came over to my house. 

It was a little awkward cause Dan and I had never been friends. 

“What are we even supposed to do?” Dan said, kicking the backs of his sneakers against the foot of my bed. 

“Mr. C said we should review what we learned in class,” I said. 

“So I guess we get naked, then?” Dan said.

“Yeah,” I said. “Lemme go lock my door.” Mr. C had been pretty clear that we should study where we had space to ourselves. When I turned around Dan had already stripped off his shirt and was lowering his pants. I always thought he had a nice body - hairier and muscular than most of the guys in our class, except Kuzak of course. 

“So…” I said, once we’d gotten naked. Dan knocked my hand away from where I was using it to hide my junk. 

“I’ll go first,” Dan said with some frustration. “Mr. C said we should examine each other,” he said, getting on his knees. “Your cock is definitely bigger than mine,” he said, grabbing my balls and cock so that I flinched. “Balls are maybe smaller, though. Cool it’s already getting hard,” he said as my cock started to rise. He felt up my thighs, my stomach and chest. My nipples stiffened as he passed them over my chest. “You’re so smooth,” he said.

“My dad is too,” I said. Dan continued moving his hands down my shoulders and back and grabbed my ass. Now I was raging hard. “Bend over,” Dan said. I did as he said and Dan spread my cheeks and looked at my hole. 

“Does it look like Mr. C’s?” I said.

“Yeah except he had hair around his,” Dan said, and ran his finger around the rim of my hole. “What’s that feel like?”

“Good,” I said. 

“Well Mr. C said we can use spit,” Dan said, and got his finger wet in his mouth. “I’m guessing you’ll be tighter than he was,” he said, and unceremoniously slid his finger inside of me. 

“Ah!” I called out. “Go easy.”

“Sorry,” Dan said, but he kept shoving his finger in and out. “Does it still hurt?”

“Not as bad,” I said. “It feels weird, but kinda good.”

“Here let me see if I can fit my dick inside,” Dan said.

“Okay…” I said. “Are you sure? Mr. C didn’t really say we should do this…”

“We did it in class,” Dan said. “Let me just try.” I didn’t say anything as Dan got spit on his dick then pressed it to me. It took a couple tries but eventually he got it all the way inside. 

“Fits in,” Dan said, and pumped in and out of it a couple times. I was just starting to get used to the feeling when he stopped. “Okay, your turn,” he said. I stood up and felt up his body. His cock was still hard and slick. Even though it was smaller than mine it was still a pretty big dick and I thought: whoa, that was just inside my ass.

I had him get on all fours on my bed and spread his butt out so I could get at it better. I thought it looked even better than Mr. C’s, all small but muscular, tight and ringed with dark hair. I got my finger wet and even licked at his hole to get more spit on it which he didn’t seem to care about. Then I slid myself inside of him. Dan reacted immediately by pushing back on my dick. It was like he was fucking onto it.

“Oh damn,” Dan said. “That feeling is so crazy. Holy crap, oh my god,” he kept saying as he bucked back onto me. 

“I’m close,” I managed to say but Dan kept bucking and never stopped as I pumped a giant teenage load into him. When I looked there was a huge puddle of cum on my bed.

“Whoa did you cum when I did?” I said. Dan looked at it.

“I guess so,” he said. “It felt really crazy - not even like I came, just like it spilled out of me.” 

“We should definitely put that in our report,” I said.

“Cool,” Dan said, and grabbed his briefs from the floor. “Do you mind writing it?”

—-

We got a C minus on our report. None of the other guys did very well, either. So Mr. C announced that we’d be spending some more time on this section, and that Friday’s class would be another demonstration. 

“Think we’ll get to fuck him again?” Anthony Mackelis said in the hall after Mr. C made the announcement.

“It wasn’t fucking,” Chucky Sorenson said. “He was just showing us how fucking works.” Even I rolled my eyes at that one. 

Friday came and we were all surprised to see not just Mr. C at the head of the class but also Mr. Delany, our history teacher. And next to him was Coach Watts. 

“Hello gentlemen,” Mr. Delany said with a nod of his head. Mr. Delany is one of those intimidating teachers who get respect - he’s a serious guy. And seriously built - many times I’d noticed his ultra-muscular body under his tight button-downs and pants and wondered what it looked like naked. 

“Hey guys!” Coach Watts said as we continued to file into class. Everyone loves Coach - he’s real friendly, even when he’s making us do laps around the gym. 

"What are you doing here, Coach?" Chucky said and Coach looked to Mr. C, who was shutting the door and told us to go to our seats. 

“One of the limitations of our lesson from a few weeks ago was that you only got to examine one type of developed body: mine. There are many different types of bodies, of course, and they respond to stimulus in varying ways, which we’re going to explore today. Mr. Delany, Coach, would you please disrobe for the class?”

We were all quiet as our teachers started to get naked in front of us, Mr. Delany removing his tie and Coach Watts lifting his t-shirt up over his round, hairy stomach, his whistle landing against his barrel chest.

“Now you’ll notice a couple of things straight away,” Mr. C said as Mr. Delany unbuttoned his shirt and Coach Watts lowered his shorts. “Coach Watts is of a shorter stature, with a body that has a lot of mass, particularly around his legs.”

“Hey now, Eric,” Coach Watts said in his jocular tone, using Mr. Christianson’s first name. 

“No judgements,” Mr. C said as Coach Watts smirked and winked at us, flexing his hairy pecs and strong arms. “Every body is different, and there’s no one way that bodies should be.”

“I still get plenty of attention from my wife,” Coach Watts said, with another wink. I could believe it: Coach is an incredibly hot daddy type, with a balding head and a handsome, square-jawed face. “Now our friendly history teacher over here…that’s another matter entirely,” Coach Watts said, looking with interest as Mr. Delany stripped off his shirt.

“Indeed,” Mr. C said, coming over to where Mr. Delany was undressing. “Jerome, how often do you work out?”

“Well, I’ve been bodybuilding for most of my life,” Mr. Delany said in his soft voice. “I usually lift once a day, sometimes more if I’m not too bogged down in grading papers,” he said, smiling at us as he stood and let us admire his considerable physique. I knew most of the girls in our school had a crush on Mr. Delany, tall and handsome as he was with striking Black features. 

“Keep you underwear on for now,” Mr. C directed. “And class, gather up front. I want you all to get a good sense of their bodies before we get down to the nitty-gritty.” We all circled around our teachers as Mr. Delany shucked off his pants and Coach lowered his shorts. Mr. Delany had on a pair of black briefs. It was impossible not to notice how full and low-hanging the pouch of them was. Coach Watts wore a jockstrap and I moved to the side to try to get a look at how the straps hugged his plump butt. 

“A few obvious things: notice the definition Mr. Delany has here in his chest and abdomen. This is the result of a lot of hard work, mixed with genetics. The strong shoulders…” Mr. Christianson said, putting his hands on Mr. Delany as he spoke. “Massive pectorals,” he said, hoisting one of Mr. Delany’s tits in his hand. “Tight abs. The legs, too - defined thighs, strong calves. Turn around?” Mr. Delany complied. “Lats, traps - the extreme v-shape of the back and the incredibly toned glutes. Very much an ideal male form. Thank you, Jerome,” Mr. C said, and Mr. Delany turned back around.

“Now Coach Watts here is also packed with muscle,” Mr. C said, going over to Coach.

“Yeah but I can’t keep up with this guy,” Coach said, punching a fist into Mr. Delany’s shoulder. Mr. Delany smiled bashfully. 

“The muscle tempered by his body’s natural mass and heft,” Mr. C continued, tracing a finger down Coach’s strong bicep and across his chest, down to his round stomach. “Turn around, Coach?”

My eyes were peeled as Coach revealed his beefy butt to us. I’d always been curious about it, having spent many gym classes missing the ball because of the sight of Coach in his tight blue shorts. Now I was seeing it naked for the first time: plump and shelf-like, covered in hair. 

“This provides a nice contrast to Mr. Delany here, in terms of body hair. Coach is obviously much hairier. Note the difference in mass and heft with regard to the thick thighs and powerful glutes,” Mr. C said, grabbing one of Coach’s big butt cheeks in his hand. “Okay, you can turn around,” Mr. C said. Coach smirked as he did. It seemed like his cock was plumped out a bit. 

“Great. Now let’s explore the differences in genitalia between our two subjects. Jerome, Eddie - would you mind taking off your underwear?” Coach was smiling as he lowered his jock strap. His cock was fully hard now, and even had some precum at the tip. But most of our eyes were glued to Mr. Delany as he lowered his briefs and unfurled his long, thick dong. It was as big a dick as I’d ever seen, and as we watched it started to rise, too.

“Don’t be afraid to get up closer, class. There you go, Dan,” Mr. C said as Dan DeMarco sidled up to Mr. Delany, his eyes peeled to the huge dick that was rising before our eyes. “Both of our subjects are experiencing some level of sexual response, so watch carefully. Note how hard Coach is already, with some pre-ejaculate fluid already expressing from the urethra.” 

Mr. C pointed out the different times it took for different men to achieve an erection, and when Mr. Delany was fully hard he noted what he called his “exceptional endowment.”

“It’s freaking huge,” Dan DeMarco said, wide-eyed and unable to tear his gaze away from Mr. Delany’s huge, pulsing boner.

“It sure is,” Mr. C said with a smile.

“One of the biggest I’ve ever seen,” Coach Watts said as Mr. Delany stood there, somewhat embarrassed-looking from all the attention, but his giant boner never lowering from his body and shaved crotch. 

“Now class, I want to invite you all to explore Mr. Delany and Coach Watts’ bodies - you’re here to learn and they are here to assist you.” People seemed hesitant but I went right up to Coach Watts. I couldn’t believe I was gonna get to feel up his hot body and fat ass. I noticed Dan DeMarco didn’t hesitate either, just went up to Mr. Delany and went right for his dick, wrapping one hand around the thick shaft and lifting Mr. Delany's heavy balls in his other hand. 

I grabbed Coach’s firm butt in my hand, squeezing it a little. When I looked at Coach to see if it was okay he just winked at me.


“Like that big butt, Nate?” Coach said.

“It’s really cool,” I said, feeling up the curve of his ass to his lower back.

“Start on your squats now and you’ll have a butt like mine when you’re my age,” Coach said. I looked over at Mr. Delany; Anthony Mackelis and Dan DeMarco had their hands all over his dick while the other boys felt up his bodybuilder frame, eyes full of awe. 

“Great job, guys. Explore all you want. Coach, it seems the boys are particularly interested in your posterior - would you mind getting up on the desk and spreading it so they can get a really good look?” 

“No problem,” Coach said, and hoisted himself up on the desk to get on all fours. Me and a couple other guys went right around to his spread, hairy butt. It really was a sight to see Coach’s pink hole in the midst of those massive cheeks. 

“Go ahead and touch it, Nate,” Mr. C said in my ear. I reached out a finger and put it to Coach’s butthole. It was hot and slick. “See how it flexes and moves as you touch it, almost like a reflex,” Mr. C said. He moved over to where Mike Kuzak was feeling up Coach’s tits, hoisting one then the other in his hand. “Feel his nipples, Mike, how they harden to the touch,” Mr. C said. Mike nodded and smiled as he tweaked Coach’s tits. I could see Kuzak had a boner in his jeans. I had one, too. 

Read Pt 3 here 

All characters are age 18 or older.