I don't understand what the big deal is about butt hair. Your butt is an extension of your leg, it's natural to have some butt hair, methinks. I'm not agile enough to check, but the bottom part of my cheek closest to my leg doesn't feel very smooth, so I'm assuming there are some prickly butt hairs hanging out there.
I guess I'm lucky-my boyfriend's butt is about as hairy as his head, so he can't comment!