At the risk of sounding like a cutter, I knew I was a bit of a masochist before I even really knew what sex or submission was. I would never want to do anything horrible to myself, but in grade school I would always be the one to initiate games like bloody knuckles or slapping games (you try not to flinch while I slap/punch your arm/leg as hard as I can, and then I'll try not to flinch when you do the same to me). Later (and sometimes even now), I would wrap rubber bands around my hand or arm and snap them, so that the welts caused designs. Just so you know, I was an emotionally stable child with loving parents and no history of abuse- I just liked small to moderate doses of pain, and the adrenaline rush they caused.