I shave my ass with a straight razor, and have since I was 18 - you know you're hairy when you have a lot of chest hair at 15. I've only ever gotten the occasional scratch, which I tell the guys in the locker room was a scratch from a girl, but who am I kidding - it's kind of obvious that half the team shaves, or waxes, their asses despite football being the last bastion of "manly men."