What's the least amount of contact that's brought you to orgasm?

Solo or otherwise!

Last night I was having some fun alone time, and for some reason my nipples were just super sensitive. I've always been into nipple play, but I was able to just close my eyes and massage them - slowly and calmly at first, but with increasing strength and violence, until I was writhing on my bed twisting my own nipples. In the middle of that the sensation got so intense that I'm pretty sure I orgasmed (not ejaculated necessarily, but, as a bottom, something not dissimilar to an anal orgasm).

Anyone else have stories of getting there with not that much touch?