Waxing Philosophic In The Hills

So i know I am breaking at least a few man laws by doing this, but...

I was watching the hills last night on MTV, and I was so stoked that Heidi finally decided to ditch spencer. the guy is one GIANT bag of douche and a half. He cheated on her all the time, and even tried to hook up with one of her close friends.

Heidi is crazy hot, and the closest spencer ever came to doing anything remotely boyfriendy for her was when he tried to stick up for her to one of her co-workers...but even that turned into him trying to start a fight with the guy, and making fun of his sunglasses. Such a total douche.

So at the end of last week/the beginning of this week, she sent him packing. Cool. She's hot, she works the line at area, which is like a block from my best friends place, so i can totally hook it up. except then, at the end of the episode, she decides to give the guy a second chance.

Why do you girls do that? what is it about total douche bag cheating guys that you find attractive?

I know I know, this is a lot of ridiculousness considering it was brought on by The Hills, but I just can never understand that shit, and seeing it on that show distilled the whole process down to it's essence in one quick half hour. start of show: you're a cheating douche. end of the show: i'm sorry, it was all my fault.

Huh?

Can anyone explain this? (Other than the pat: "girl's like bad boys" or "girls like guys who treat them like shit" I mean explain WHY they like people who treat them like shit.)