Laughter and bladder control

[Incubus]

Is there some wiring in the brain that prevents you from operating your bladder while simultaneously laughing hysterically? Becuase there have been a number of occasions where people I know have pissed themselves laughing.

The first time this happened was when I was visiting my cousin back when we were kids. She was wearing a leotard and I was telling her jokes before she was to run off to the bathroom. She laughed harder and harder and said "Stop making me laugh you are going to make me pee myself!" but too late, she did!

This spring a female friend and I were walking across the parking lot on the way to a PE class we had. I was telling a funny story and did not know that my friend had a full bladder at the time. She was laughing then doubled over and started screaming "oh my god oh my god etc" and said she peed her pants but I thought she was joking till she showed me- man oh man she must have unloaded a liter of pee into those shorts but amazingly used her shirt to hide it until she got to the girls locker room, where she used the hand dryers to completely elminate the evidence.