You figured most guys masturbate throughout there lives it wouldn't be uncommon to forget "to cover your tracks" or leave evidence behind.Sometimes depending on what is left behind can almost be as embarrassing as getting caught in the act. I had had jerked off one time after school. Shorty after I was called down for dinner. My buddy came over shortly after. We went up to my room to play some video games. I was setting up the game when I heard my friend laughing. I turned around to see him picking up the crumpled tissue that i had loaded with semen on the nightstand. He turned and yelled gross and threw it at me and started laughing. I was mortified and felt uncomfortable around him for months since at the time i thought i was the only kid in school who masturbated. In college a buddy and i were visiting a friend a couple rooms down. My friend wanted to borrow a book he had which was on the floor near his bed.When he bent down to get it he said "dude why do you have tissues under your bed?" I just looked at him like your kidding, unfortunately he was really that naive! athough if he gave it any thought later he might have put two and two together. Our buddy just laghed when he asked more so because I think it was obvious without having to ask. Having you ever come across evidence of someone's masturbation habits or accidently left evidence behind that was noticed?