When I was a kid I used to wet my bed. My parents were nice people and didn't really punish me or even let me know that this would be unacceptable at some point. So I just kept on doing it.
Well, one night when I was about 6 I woke up and I had to poop. Having never been scolded for pissing in my bed, I just stayed right there and shit all over my pajamas and my sheets and went right back to sleep.
The next morning my mother was doing the laundry. I still can remember the expression on her face as she held up my bedsheet covered in streaks of 8-hour old shit... Well, let me tell you, that day I learned that it's not accaptable to piss OR shit in bed.
-- Lil' Gravy