He had answered an ad that said test subjects were needed for a human sexuality study, and he figured he could use the fifty dollars that was offered....Yeah, I understand," Ben, answered, looking up to the pretty face that was above the tits. The woman was about 30, shoulder length blonde hair that framed a beautiful face. She was tall and slender and seemed to have larger than average tits. "You need me to jerk off in the jar as many times as I can in an hour. I get fifty dollars for each load.. I insisted that I had to go, but as I dried off and began to head out, I realized I was more inclined to leave so that I could think about the two of them being in the pool alone. I wasn’t fantasizing about a threesome. I was fantasizing about Jason taking full control of Amy. About him taking her back to his room after a heavy flirt session in the pool, knowing I was in class for the next hour, and stripping her wet bikini off. She would hardly resist. Soon their moist bodies would be clung. She hunched forward and I felt my ass trying to expand to accommodate this new invader. The pain was terrific as my hole gave way and she slid in a couple inches. She pushed again and this time slid up until all ten inches were in. My asshole was a stretched beyond belief and gripped the dildo tightly as it moved in and out. I could see light streaks of my blood coating the surface as she rammed it mercilessly in my poor ass. I could hear myself moaning in pain as my mind tried to distance. In fact, he was already thinking, even as Pam got dressed again and kissed him goodbye, anxious to get away before Chris’ mum returned from her aerobics class, that this was just the first of many more such encounters to come. And next time, he was sure, it would be better. It would last much longer. And perhaps he could do those other things you were supposed to do. Like foreplay, for instance. Alas, it was not to be. Pam never went into Chris’ room again, although he spent many hours in.