The American Pit Bull Terrier is not a breed. The American Pit Bull Terrier is one of the purest breeds around, and one of the most ancient.
Pit Bulls attack humans. Most dog attacks that are reported are not true American Pit Bull Terrier, but mixed breeds being reported as American Pit Bull Terrier. There's confusion labeling mixed breeds as American Pit Bull Terrier.
Pit Bulls can lock their jaws. Here's the biggest myth of all, the locking jaw. The tenacity of the American Pit Bull Terrier causes this breed to hold on to anything with unbelievable strength. No dog has the ability to lock it's jaws. A responsible put-bull owner will have a breaking-stick on hand; this is a stick that is meant to break a dog's biting grip on something.
Pit Bulls are not family-friendly. Another myth that always gets me is that the American Pit Bull Terrier cannot be trusted as a family pet, that they should only be on chains and fought. Well, I've owned this breed for 16 years and this breed is the most loyal and loving breed I've ever owned. They make awesome jogging companions, couch potatoes and Frisbee players. Eventually we would like to start weight-pull with Sadie.
Pit Bulls are aggressive against humans. Here's another myth that gets me, so I'd like to set the record straight - never confuse dog aggression with human aggression. Through hundreds of years of selective breeding, the American Pit Bull Terrier has been bred to be dog-aggressive. The breed is hard-wired for this, but any human-aggressive dog was culled, therefore creating human-friendly dogs from this selective breeding. These dogs I would consider to be the most trustworthy around humans.