Widebody has it dead on. You can't mess with un-trustworthy girls if you don't want to get hurt.

And as much as everyone thinks its cool to be in a "friends w/ benefits" scenario... it really isn't. I mean there are the perks, but really, if its someone you care about, the physical closeness just sorta turns it into something more than you want it to be... its emotionally draining, and almost always ends in ugliness.