Nude in College Biology Classroom

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Guys have to undress and jerk off in front of girls.
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4.17
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I am happy to share my stories. But, French of origin, thank you for your understanding for my English which remains very imperfect!

___________________________________________________________________________________

"Ladies and gentlemen, welcome to the most interesting and most interactive course you're going to have this semester. We reserve it for the last semester of your senior year, because we want to have mature students. On this subject, I'd like to underline that none of you are below 18. This is strict regulation and, saying this, I'd also like to welcome Christophe F who just turned 18... yesterday. Welcome Christophe in this new world for you, which is Reproductive Biology!"

By mail, we had been informed of the departure of the former boss of the Department of Biology, Madame Séverine Duriez, a big slut who made us all suffer. She was fired for moral harassment... No doubt jealous to see people of normal build and happy! I lean over to Gregory, my best friend, to whisper in his ear, "She's hot, the new teacher!"

"Yeah, look at those boobs!"

Mrs. Feidt frowns at us chatting and resumes her speech, "Reproductive Biology. It is a vast program that we will cover together with theoretical teaching here, but also through tutorial and practical work sessions. With the huge cost of Mrs. Duriez's departure, the Department must save money and, therefore, this interactive course will require even more participation on your part! I remind you of the written consent that you signed: as young adults, you know that we are going to discuss sensitive subjects, that you will be exposed to images or situations showing private parts or sexual acts. So, of course, I don't want any tapes, photos, or college gossip! What happens between us stays between us! Understood?"

Our thirty heads nod in agreement. We are 7-8 boys lost in the middle of a good twenty girls. I managed to get Greg with whom I practice judo to join. Among the girls I know Emilie and Evelyne, two of my sister's good friends.

"The first lesson is devoted to the male productive apparatus. But I hope, ladies, that you won't be too disappointed, because it's a rather dry course and the illustrations that I usually use cannot be seen because the overhead projector is out of order... I see grimaces of disappointment, but the next tutorial session should make your disappointment go away! Although I'm sure your boyfriends have already told all you about it!" Big bursts of laughter in the room...

"But now let's get down to business..."

The course is indeed very off putting. What surprises me the most are the statistics given by Ms. Feidt: the average size of an erect dick is 6'' and a circumference of 4''; a man comes on average 2 times a week and an average squirt counts about 3 to 4 jets of 1 to 2 cubic centimeter each, i.e. 5 grams in total...

Wow! As soon as I got home, I take off my boxers, releasing my already erect cock from thinking that I was a superman! Cock in the air and without shame, I go to retrieve a glass from the kitchen and my mother's measuring tape: I'm ready for my personal stats. And here are the results: 7.5'' and 5.5''! Wow, at 19 yo I am already 25% better endowed than the average! And, with a bit of luck, I will probably exceed 8'' and 6''! Even if I understand that the dick is not a muscle... It's a shame because I would have multiplied the bodybuilding sessions... Whatever, it doesn't harm to jerk off; this being my favorite hobby!

Excited by my discovery, I take the next step and jerk off vigorously. I have to aim well because my cock is really vertical and I don't want to lose any drop of my cum!

Very quickly, I feel my sap rise in my stem which I try to bring back horizontally, just in front of the glass and it's off: one, two, three, four, five, six big fat jets... Then follow 4 others of good size and finally 5 others less voluminous... Wow, that makes 15! And if I hadn't already squirted this morning, I would probably have dropped 17 or 18, or even 21 (my record!)!

The weight is also a good surprise: 23 grams!

I definitely could have been part of the "10 cc" band! Mrs. Feidt explained to us that their name referred to a "very large ejaculation"... So, I could have been both the guitarist and the guy who plays the drums!

Arriving at the tutorial session, I tell Greg my measurements. And I see him smile and say to me, "I beat you EASILY and lengthwise and widthwise, Little Dick!"

I'm not completely surprised because, although I've never seen him fully erect, I've already noticed that Greg has a big lump between his legs. And then of course I've seen a lot of videos on porn sites and I've noticed that some actors have a real baseball bat instead of a dick!

But I also noticed that even in the scenes where the guy is spitting out a lot of cum (the ones shown in slow motion after the live speed scene), there are rarely more than 11 or 12 squirts. So, I don't give up and continue, "Yeah, but I'm sure I beat you with my 15 hearty throws!"

I read in his eyes a sort of astonishment and, as the lesson begins, he shows me the 5 fingers of his left hand and 3 of his right one: Yeah, I won!

Ms. Feidt begins, "I will first introduce you to Deborah, a doctoral student within my team. She will be in charge of your tutorial sessions and she and I will supervise the practical work sessions. You will notice that the curtains of the room have been drawn: indeed, this first session on the male reproductive system is illustrated with a medical mannequin. But I leave you now, dare I say, in Debbie's hands..."

As soon as Mrs. Feidt has left, her extremely cute young assistant speaks, "Like you, I took this course 5 years ago and loved it so much that I made it my specialty and am now working on my thesis on "Ejaculation in men and the causes of its variability". As you know, our budgets have been reduced and therefore we will not have a professional model to illustrate this tutorial session. So I'm going to have to call for a volunteer..."

I lower my head a little because I'm not ready to get naked in front of so many girls, especially since I couldn't find clean boxers to put on this morning and so I came commando! I feel like there is no rush among my fellow guys...

2 or 3 girls say "Chriss, Chriss!" As if to demand that Christian devotes himself. Easy to understand why: he's THE handsome college guy; he is 1 or 2 years late and, not very good in class, he is the captain of the Volleyball team. It's true that he is a handsome dude.

I've also heard that the girls give him as nickname "banana split". Since I didn't understand, my friend Michelle said to me, "Go see on the internet: type Chriss Strokes and you will understand! The same evening, I was able to see the club that this Chriss had between his legs! Probably over 11'' and well curved upwards like a banana. With 2 big balls underneath and a good dose of cream coming out: Banana split!

Our Chriss doesn't need to be asked too much and joins Debbie on the platform. She welcomes him and ask him to put his clothes on the chair and keep his boxers on.

Once half-naked, he faces us, his legs a little apart and readjusts his equipment a little in his bright red boxers. He is tall (at least 6'3''), with a toned and muscular bod (maybe almost 200 lbs ). He is very dark, with hair that falls to his shoulders and very blue eyes. He is also quite hairy, in any case much more than me...

"Before getting serious, I would like you to observe in Chriss the effects of testosterone on his secondary sexual characteristics: observe the strong muscular development of his shoulders, his arms. His pectorals are very prominent and his abs form what the boys call an 8-pack! His calves and thighs look extremely powerful and, thank you Chriss for turning around, his buttocks are very rounded, no doubt the result of intense practice..!"

A girl interrupts by asking "What do you mean by intense practice? sport or sex?"

"Both, no doubt!" Debbie replies blushing. Then she continues by trying to regain her seriousness, "According to certain studies, coitus corresponds for the man to a 5-mile run!"

Chriss doesn't seem insensitive to being the center of our group's attention, as the bulge in his boxers looks even bulkier than initialy...

"I continue with the other secondary sexual features that Chriss illustrates well: observe the density and strength of his long hair and, even if he trims it, the forest of hair that covers his chest. It is prolonged by a line which goes down on his abdomen and widens while approaching his penis. Finally, his legs are covered with many black hairs. Although clean-shaven, his face seems colored in blue as his facial hair is dense! You probably remember the count "Bluebeard"..."

We all stare at Chriss, the girls probably even more, just like Patrick (the fag who has already tried to flirt with all of us, guys!)

Debbie conducted all her explanations by touching here and there the body of Chriss, on which we saw appearing goosebumps. The other effect is that his boxers are now stretched to their maximum by a bar of flesh that spreads out obscenely on the right...

The girls laugh and we guys are very impressed. Patrick licks his lips, literally and figuratively. Chriss seems genuinely happy to show off his massive manhood.

Debbie is obviously not shy because, despite noticing Chriss erection, she says to him, "Thank you Chriss for taking your boxers off. What is happening to you is quite normal for a young man like you, in great shape and whose testicles seem to be extremely good producers of testosterone!"

Pleased with the compliment, he slides his thumbs down the side of his boxers and pulls them down in one fell swoop and releases a sumptuous cock that wobbles a little and stabilizes, swinging a little in front of his abs. It is both very long and very thick: I did well not to show mine!

"Banana split!" is shouted by one of the girls, which triggers everyone's laughter and the smile of Debbie and Chriss who undulates a little from the pelvis to bring his cock to life, which takes the opportunity to show the ceiling even more clearly!

"We will not be able to describe the penis at rest. We'll do that later. We therefore go directly to the erection description. And what a HUGE specimen we get here! When stimulated, the penis begins to lengthen; then it grows bigger and tends to curve upwards, giving it a bit of a banana shape" She says, laughing a little... "Excitement is such for Chriss that the curvature is very strong and his glans rubs against the hairs of his navel! This is of course also due to the impressive size of his penis!"

To show us the rigidity of his cock, she even tries to lower it and releases it: we then hear a thud when the glans hits against his navel. She does it several times, which makes the girls laugh and forces Patrick to readjust the front of his pants! I also notice that I have developed a very strong erection although I am not really attracted to guys and cocks...

Then she grabs the measuring tape and explains the correct method for measuring. She picks up the monster that Chriss is delighted to show us and goes to the measurements and proudly announces "We have here an exceptional specimen, which undoubtedly ranks in the best-endowed 0.1% with 11.5" in length and 7.5" in circumference! Congratulations Chris! Just a little advice, if you allow me: think about preparing your sexual partners..."

Then she offers everyone to come and have a closer look at Chriss's penis, even adding with a questioning look "If Chriss allows it, you can even touch his penis, feel the rod to assess its rigidity, slide his foreskin over his glans and weigh his testicles. Chriss nods and is pleased to see the girls rushing to see the monster up close. Each in turn, they touch his dick which seems, if possible, to gain even more pride. Patrick has slipped into the group and takes the opportunity to even openly jerk off Chriss who kind seems to appreciate the treatment! We other guys walk past his cock, both admiring and also... very jealous, I have to admit!

Debbie resumes the session, again manipulating Chriss' big stiff cock, "To maintain such a strong erection for such a long time is the prerogative of very virile young men. What is impressive about Chriss is also his ability not to ejaculate too quickly, despite all the stimulations you gave him, isn't it Patrick?! This ability is quite rare in young men, isn't it ladies?!"

"The masturbation I now give on Chriss penis causes pre-cum to flow from his meatus and you will soon see his sperm squirting out..." As soon as she uttered these words, Chriss cock twitches, contracts and sends 4 or 5 big jets of spunk which gush violently and even reach the front rows, spreading over the papers of the girls sitting there: Splash, splash, splash!

She releases Chriss cock and wipes her hand with her handkerchief, then continues, "Thank you Chriss for your participation...very active! As much as our friend is a champion for the size of his penis, he is in the middle of his age group for the number of jets and their volume... I note however a very good shooting distance, right, ladies?! His penis will now gradually recover its rest size..."

But Chriss cuts her off with a negative nod, "Um, not really... When I spit my cum out, my dick snaps back to attention pretty quickly and, for it to come back to rest, I gotta squirt again..."

At the sight of his cock showing the ceiling again, Debbie adds "Every boy has his own characteristics... We're going to let Chris show us the way he masturbates and be able to watch his ejaculation again... Beware ladies!"

No sooner said than done: Chriss sends himself a new volley of 6 big jets of very creamy jizz that he directs on his chest.

With the tutorial session coming to an end, Debbie quickly moved on to measuring Chriss cock at rest. She calls him a "grower ", his penis measuring only 4.5" in length.

She ends with 2 announcements, "There will be no class next week. But we will see each other again on Wednesday for the 1st practical work session entitled "Research of the localization of hyaluronidase in the spermatozoon" which will take place in the biochemistry laboratory and I URGE the boys to avoid any ejaculation during the 24 hours which precede because we will need to work from their sperm samples!"

As a well-disciplined boy, I haven't touched my cock for more than 24 hours (am I ready to be a candidate for BDSM?!) and took care to wear my sexiest and cleanest boxers (without tires traces at the rear!).

Mrs. Feidt and Debbie welcome us and ask us to form 10 teams of 3, each with only 1 boy. We organize ourselves and there are 8 teams as requested and... 2 which only have girls! I find myself again with Emilie and Evelyne; my sister's girlfriends, which doesn't really make me happy...

Mrs. Feidt seems a little disappointed and explains why, "Each trio will need 10 cc of fresh sperm to locate this hyaluronidase. In the past, we had the means to buy semen from pigs at the neighboring veterinary school... Each trio will therefore have to obtain this quantity of semen from the boy in each group! For groups without a boy, we'll see what we can do..."

She walks over to the blackboard and writes the following question, "To put (y)our minds on the alert!": "If we could put it together, what would be the volume of all the sperm ejaculated in 24 hours on earth, given that we are almost 10 billion, that half of the living men are able to ejaculate, that they ejaculate twice a week an average volume of 6 cc?"

"4,286 cubic meters!" Announces the nerd of the group...

"Right, Kevin! And that represents almost... 2 Olympic swimming pools filled to the brim! Who wants to dive in?!"

"Me, Madam!" Launches Patrick, which makes our whole group explode with laughter!

"We are now getting down to business: thank you ladies for encouraging the male in your group to ejaculate the right amount in the beaker... As soon as the operation is completed, you will do a quick weigh-in and we will move on to the biochemicals analysis..."

A little embarrassed (except Chriss of course!), each boy pulls down his pants to expose his cock... We see them of all sizes and shapes: some already have a nice erection, others like me are intimidated by the looks of girls, Patrick fixes Chriss cock and the 2 are already sporting the erections of the big days!

Like the other guys, I of course check out the stiff cocks of my fellows. This is a primitive reflex: dudes need to compare their dicks. I'm far to be the smallest: good for me! And Greg is indeed well hung, not as much as Chriss, but quite close... I'm sure, the chicks will now go crazy for him!

After a few minutes, we're all boned and ready to cum. The girls laugh and are all excited (we feel that their pussies must be very wet!). We begin to hear on the right or on the left sighs announcing cum shooting... And when one begins to spit out his juice, it doesn't take long for the others to follow one after each other... As I followed the instructions well, I feel that my balls are overfull and will cum big!

Let's go: the first jets fly out of my cock at an immense speed and with a fabulous volume; I have a feeling it won't stop! I count the jets and I beat my record with 23 jets!

Attracted by the cries of my female partners, all the girls (and Patrick, of course!) gathered around our group to see the show and I got a round of applause when the last drops erupted: my quarter of an hour of fame!

Ms. Feidt and Debbie also can't believe their eyes and anxiously await the weigh-in. When the result falls (27 grams, anyway!), they burst with joy...

"We have just broken a world record here in this laboratory. Your friend Jean has just ejaculated 27 grams of very dense, sticky and creamy semen! Kudos to him!"

Everyone applauds, which leaves my dick proud, standing up at full stretch!

"This will allow you to share your semen with the 2 groups of girls without a sperm donor! A simple question to Jean: do you still have such abundant sperm and how many times do you ejaculate each week?!"

A little red from this sudden public interest in my sex life, I answer "Uh... At least once a day, often 2. And, yes, I cover my abs and my chest well..."

The peals of laughter and applause resume and Mrs. Feidt interrupts them with her question, "If every man on earth who has the capacity to do so ejaculated once a day the volume that Jean ejaculated today, how many Olympic swimming pools would be filled in 24 hours?"

"27, Madam! Exults Kevin.

"Last week I heard you were extremely impressed with Chriss' huge attributes -- and I saw that for myself today! You must also be the same way extremely impressed by Jean's ejaculatory capacity! You have 2 young stallions in this class!"

After the giggles, we all got to work, as many of you are still wondering, to determine that this hyaluronidase is located in the acrosome of the male gamete. This enzyme helps the male gamete to penetrate the egg: we all owe it our lives!

Mine (my life!) has changed a lot since that day in the lab: professionally, I started working part-time with Debbie who wants to study my lifestyle to understand the origin of the fabulous volume of my ejaculations (which she insist to measure twice a week in live!) and am even paid for that... On a personal level, it is now very rare that I need to jerk off alone: I usually eagerly empty myself in the pussy or in the mouth of one of the college chicks who sticks to my cock like hungry bees!

Popularity indeed depends on little: a big cock like that of Chriss or overfilled balls like mine!

THANKS FOR READING!

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4 Comments
AnonymousAnonymous5 months ago

This story had me incredibly wet and goodness my meow would be throbbing in that class. Fantastic beautiful story and 🔥 HOT. I would have given U fellas my number for a private party indeed. If U have any more stories like this please do post. Yummy! 😋😛🥰

wankerholic42wankerholic425 months ago

As my name suggests, I am a great lover of masturbation, solo and mutual, with a particular penchant for cum. I love watching or making cocks ejaculate. This story more than catered to my needs!

NudeInMaineNudeInMaine6 months ago

I like this story. One of my fantasies is to be half of a m/f couple teaching sex ed to middle school students (I think sex education ought to start by their 16th year). The course would include sexual demonstrations and student participation. The agenda includes the nudist lifestyle, social nudism, masturbation, mutual masturbation, foreplay, vaginal / oral / anal sex, bi sex, positions, various sexual fetishes, etc.

AnonymousAnonymous6 months ago

Excellently done. Your grasp of the English language is quite good. Tres Bien.

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