So back to that situation where i had no porn. I dont have a lot of ideas to jack off to so the first thing i thought about, since it was recently brought up, was a fantasy about producing cum for my labmates to analyze. Now my class had a small male-female ratio. There were little males compared to females and there were about 1-2 males in every group of 5 in our class. So yep that meant that i was the only male in my group of 4 other girls, which means they would be looking to me for the sperm samples. Also these girls are virgins like me. So the story goes we all go into class, all knowing what our activity for the day is. When the class has assembled and the professor arrives, we know what to do, prepare for the activity. So my groupmates all look to me and go “time to jerk one off, op!” all being their usual cheerful and giggly selves. I love their encouragement. One girl asks “will you be okay? Do you need porn?” with big smiles. I shyly say not really and I take the bottle one of my groupmates was assigned to bring and head to the comfort room for some, well, comfort. All the dudes in class embarrassingly assemble to the restroom to have a group masturbate-a-thon. All the while im thinking about how the girls in the class feel, especially my groupmates, that im currently in the restroom and jerking off. Thinking about them thinking about me jerking off. Thinking about them wondering what im thinking of to get off and what i look like at the moment. This turns me on and i cum into the bottle. I enter the lab where im greeted by my groupmates. They notice im all sweaty and tired after having blown a load. This makes them laugh and one of them pats my back and says “good job, op”. One of them makes a remark, “oh my gosh op so this is how much you release in one session hahaha” and they all proceed to marvel at the masturpiece i have created, my load. One of them (while wearing gloves of course, lab SOP) dips their fingers in it and play with my cum, pinching it and stirring it and all and saying “oh my gosh this is so sticky ive never felt anything like it before” which makes the other girls curious and they all start playing with my cum for a little while. This makes me blush and they all notice and again giggle at me. After that they get to work (because im exhausted and have done enough) and bring the samples around to our group’s microscope and start analyzing. They’re all smiles and full of marvel as they see my little babies swimming around under the microscope. Before soon the samples had dried out and we needed more fresh samples to study to finish our task, but one of the girls were playing with the cum bottle and accidentally spilled it. The girls all look guilty and sad knowing that i have to go jack off again to make another sample or else we would fail for the day. I think its incredibly cute when girls perform this whole sad remorseful act with the pouts and everything. So anyway they apologize and ask me to beat my meat once again, i act annoyed going “sighh fine” but deep inside im truly turned on, even though masturbating in quick succession isnt my thing and im still tired from the first time. So i repeat the process of jerking off in a girl’s sample bottle, i return and the girls are like “yay! Thank you op!” and they start handling my cum with extra care. One of them points out that my 2nd load is less than the 1st load and i explain to them why that is. They notice im even more haggard and tired now and they laugh and thank me for my work again. I am very turned on watching my groupmates study my sperm very closely under a microscope and marvelling at everything new they discover about me, my cum, and my close up sperm. While the study is going on my close friend in my group goes up to me and asks me how i was doing and how was jerking off. I tell her all about it and it fascinates her. We successfully finish the activity and we’re all cheerful and stuff and they once again laugh at me and thank me for the load.