For me, it's muscle. I hate it when a buff guy walks into the room, because my mouth always opens and I stare. That's why I don't need a gym membership. Nothing better than a buff guy except... Boobs. Boobs. Damn it, I hate it when girls where v-cut shirts. They always seem to bend over somehow and my eyes go straight to those clevers trying to sneak out. So, what's your weakness?