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

All in the Name of Science Pt. 03

... pausing to control his breathing. Tommy was sounding a little strained as well but was trying his best to keep up his end of the conversation. Their two volunteers had noticed the change and were now settling in to watch the action. Their eyes were glued to the two ECT device sleeves as they stroked repeatedly up and down the two cocks strapped into them. Again, Jamie's long, thin dick was drooling heavily. Each trip the jelly sleeve made up and down his organ served to spread his pre-cum liberally. Tommy was not as long, but his somewhat thicker shaft was glistening from the recent coating of lube and the perfectly even pace of the machine stroking him.

Carmen made a new note on her clipboard and then tapped the next button on her smartphone. My machine changed its speed and pattern again. It began the pattern of delivering four quick strokes to the top few inches of my cock, then four quick strokes at the bottom, then two long strokes covering my whole length. This was the pattern where I lost it during our first round. While I was definitely getting closer, talking with Tricia about regular things was so far keeping my urge to orgasm under control. Unfortunately for Cody, he was clearly having a hard time controlling himself this time around. Because of the earlier recalibration, the machine was now rubbing squarely on the head of his dick for the four quick top strokes and took his whole length for the two long strokes.

All of a sudden, movement caught my eye as ...

... Jamie started convulsing. His cock started spewing a stream of cum out and over the edge of the jelly sleeve. He grunted with each strong contraction of his abs until his orgasm receded and his volunteer shut off his machine. He breathed a sigh of relief and satisfaction at having cum but appeared to be upset at himself for not holding out longer. The action continued as Tommy lost it once Jamie was done. His dick pumped a rope of cum up several inches into the air before it landed straight back down on the jelly sleeve and was quickly churned into white froth. His volunteer watched as he spurted several other weaker shots of cum and then reached over him to stop his ECT device from continuing to rub his now sensitive cock.

Cody was groaning loudly now; his attempt to muscle through was clearly failing. The machine had to travel farther to cover the full length of his long cock and as a result he was receiving more stimulation than most of the other men. The pre-cum that was bubbling out of his slit with every upstroke showed that he was getting closer. The slight bucking motion from his hips only served to confirm what any of us who were watching already knew: he was about to blow. His volunteer kneeled at his side watching his big cock getting pushed to the limit by Carmen's machine. Her eyes traveled back up his body, taking in the sheen of sweat that had formed on his muscular chest and, without thinking about it, she licked her lips. That simple act, combined with the ...