i knew this guy, Joey Funicelli, who used to do this thing he called "flipping his flop". in the lockerroom, he'd start swinging his hips back and forth fast enough to cause a pendulum like effect with his tool so that it would slap against his ass-crack and then back to his stomach. you could hear this shit with the showers going and people talking. i'm still disturbed by it. why am i telling people this???