Hey, I'm having trouble finding a story I read last summer. I forgot the title and author and was wondering if I can get some help finding it. In this story, there was one guy and three or four girls, one of which being the guys boyfriend. They were all around high school aged and the guy was the narrator. One of the girls was very athletic. At some point in the story, the guy is pinned on the ground and one of the girls pulls out a gadget/machine that's supposed to make a guy cum in under two or three minutes. They make a bet and the story details the guy trying to hold on. Eventually, he ends up having sex with the athletic girl and I believe his girlfriend. Thanks for the help!