Spanking, and lots of it! And let me tell ya, it worked.

And yeah, I used to draw blood like Neal Pollack's kid too. One time I was at a birthday party and playing musical chairs. When the birthday girl took the chair I wanted, I yanked her out by her hair and chomped on her arm. I have no idea why I used to bite all the time. Aggression? Asserting dominance? Didn't get enough attention? Who knows?