This is actually a serious question although I could have asked it a little nicer, I just didn't care to. *shrug*

I definitely believe a small bit of people are indeed born really messed up. The same way we can be born genetically "flawed" in other ways I don't think it's too hard to fathom that someone could simply be wired wrong. There's some people who think of themselves singularly without consequence of how the things they say and do effects anyone around them.

On the other side of this, there are those who have been bred into such things or learned to adapt to it to get by because it gets them what they want and they see that it works. Either by having to survive that way, never being given rules and consequences, etc and several other things. There's so many variables.