In the past, I knew of a guy that seemed insatiable. Truly. I'd watch guy after guy come and do him and leave and he never seemed satisfied. Then oneday, I discovered that he is really small endowed. So much that I'm not sure he can masturbate. I don't think he ever has in the time I've known of him. Is it the pent up testosterone that keeps him going like that? With no release of that kind of thing, can that be harmful to the guy? I know how cranky and odd I get when I don't ejaculate for a while, I can't imagine this situation all that well.