14. John Stamos. It looks like Uncle Jesse learned a few things from his older friend, and the connection stayed!
"I think I was almost 18," John Stamos tells Details, "and none of my friends had really done it yet. I wasn't a geeky kid, but I was sort of...innocent. And then I was driving home with the sister of the bass player from my high school band, and she dropped her keys in my lap—my crotch area—and went to grab 'em. And I thought, 'Oh. This might be on!' And she was this beautiful woman who was maybe five to seven years older than me. So we went to her house, and she was very gentle, and easy, and walked me through it. And it was fantastic! We're still friends."