So your exotic pet might be a wonderful companion, but without thousands of years of domestication getting your back, it might get pissed for no reason and maul your girlfriend. No one told the crazy chimp lady.
Well, people probably did tell the crazy chimp lady. But she didn't really care! The crazy chimp lady was on The Today Show to explain that she treated her chimpanzee Travis like a human child, and it could drive! Her husband and daughter are both dead, the crazy chimp lady is alone in the world, and she would've done it all again.