Yeah, I'm also in the 'define sex' group. I can't remember a time I wasn't experimenting, I could have been the schoolmate with @sync . And no, there was no abuse. But later my dad did have a girlfriend who had a son about my age, so he and I were having sex to orgasm pretty much every weekend over a couple of years. We were 11-12. Then our parents split up, so I didn't see him for a while but I do remember the 'rents hooking up again a couple of years later and so the son and I were alone again overnight. At first he was all "I don't do that gay stuff anymore" but of course, he did.