I have a pit/boxer mix, and she's a sweetheart. The only time she ever shows aggression is when she feels someone in my family is threatened (for example, when a man come s into the house an dad's not home).

There's actually been a study on the skull and jaw structure of pit bulls compared to other types of dogs. Pits do not of locking jaws, nor are their jaw muscles significantly stronger than other dogs'. What makes pits and other fighting breeds so "dangerous" is that they have an extremely high pain threshold and an incredible tenacity.

I actually did my sophomore English research paper on BSL and why it should stand for bullshizz laws. I like to think my logic kicked the government's ass. I got a 90 on it, so I guess.... XD