It goes for ANY public place. I can't pee if somebody else is in the bathroom. It makes me feel awkward.
I feel even more comfortable at home.
But, y'know, alone in the school stalls is good, too.
I love to walk up to a urinal right next to another dude and say "hey, nice pubes."
It's my pet peeve when people can hear me going to the bathroom -_- haha
You can hear them peeing, and they can probably hear you peeing. Awkward.
My favorite is when some chick is just standing there doing her makeup and you know she can hear everything you do. And it echoes. >_<
FACT: It takes longer to start peeing when there is a dude using the urinal next to you.