I was 16 and discovered my Dad's stash of porn. I had never seen any porn before this, just Playboys. He had good stuff -- Swedish Erotica with high-quality color photos. When I exploded, I shot close to four feet, which remains my career best.
one time I was playing truth or dare with 3 chicks, I ended up jerking off for them to watch, that was totally hot.
Anytime that I'm able to bring myself to orgasm without even touching myself. This can happen during good poetry, good music, and even a good meditation. And I don't mean metaphorical orgasms... I mean, I'm actually shaking and moaning and shit.