Like after you were toilet trained, obviously we all do it as babies and toddlers.
I did when I was 14, I was watching a funny video with my friend and there was one bit that made us laugh so much, you know that laughter where you can't breathe and your laugh doesn't make any sound? Well it was like that, and then all of a sudden I just started peeing but I was laughing so much I couldn't stop. I was like :O but luckily my friend found it funny so it wasn't too embarrassing
You?