All in the Name of Science Pt. 03 - Sex Stories

All in the Name of Science Pt. 03

... end of their pussies.

Speaking of girls, Tricia was kneeling next to me, watching the machine stroke me with a sparkle of intense interest in her eye and a big smile on her face. Every once in a while, she would reach over to stroke my chest or play with my nipple.

"Do you mind?" I asked her after the second or third such attempt. "I love when you touch me, but I'm trying NOT to cum here, remember?" In reality, the machine was stroking only about once every two seconds, slowly enough that I was in no danger of reaching an orgasm any time soon. Still, I didn't want to hurry the process at all.

"Oops...sorry!" she grinned sheepishly. "I just can't help it." I smiled my forgiveness back at her.

At about that time, the sound in the room went up in pitch as the machines started stroking us faster. Again, Carmen wrote something on her clipboard as we each started receiving a stroke approximately once each second. The intensity was noticeably ratcheting up. Tricia's intensity ratcheted up a bit too. She was now watching my dick as if she were settling in for her favorite TV show. To be fair, so was I until I realized that would not help me hold off. I lay back down and started thinking about lacrosse plays and physics homework to distract myself from the pleasure starting to radiate through my crotch.

As I glanced around the room, I noticed several of the other guys doing the same thing. Brendan on my left was busy chatting about some class assignment with the girl ...

... who was his volunteer while Tommy had his eyes screwed shut tightly and appeared to be counting something in his head. To his right, the really tall guy was laying back completely relaxed as if he were enjoying a spa day or something. His breathing was steady and even and he looked like his mind was a million miles away on a beach somewhere. His long, thin cock was starting to drool pre-cum already, but he wasn't showing any signs of an approaching explosion. His pretty volunteer sat behind him holding his raised hands in her own and breathing with him.

After a minute or two at the current speed, we all heard the machines start to speed up again just before Carmen made another note. They were now pumping us about twice per second. I had jacked off and fucked faster than that, so the speed wasn't an overwhelming problem. The problem was that the device started adding some rotation on each stroke; as the jelly sleeve stroked upward, the sleeve turned about a quarter-turn and then turned back again on the down stroke. I'd had a girlfriend in high school who had tried that on me after reading about it in some magazine and I remember that I didn't last long for her. I've matured a bit since then and I've gained a lot more control, but I couldn't deny the twisting motion was really ramping up the sensations down below. I started replaying in my head all the hits I could remember taking in our recent Lacrosse games. The memories of the pain helped, but they couldn't completely ...