Could someone help explain this weird crush to me?

So....lots of people have a crush on batman/bruce wayne, right? that's normal. I do too. But then I ALSO have a crush on the joker. I don't know why. I can't explain it. He's not physically attractive (sorry mr. J, but it's true) and he's a friggin psychopath and he does NOT know how to treat women right. So why am I still attracted to him?? and I don't mean any particular portrayal of the joker. I mean just the joker in general. From comis, cartoons AND live action movies. Like if it was just the joker from the dark knight, it might make more sense because I've always loved heath ledger, but seriously, what is wrong with me??