MSD - I feel kind of the same way, one of my friends went all Dr Phil on me and said it was a fear of commitment..I don't think I agree though. In most cases, you don't really know the person and have no real emotional connection so why pretend you do? Know what I mean? Sometimes people just hook up and thats all it is and ever will be.
Shauk - I think she just REALLY likes sex. I've known her for awhile and hooking with guys is...well its a big part of who she is. Honestly I'm not really convinced she specifically wanted me in the first place. I think she got it in her head that she was going to get it on with two guys that night and was going to do and say anything to get it.
I think you hit the nail on the head when you said she uses sex to get approval and thats why I think she called me the next day. She's used to guys jumping through hoops and following her around like a lap dog to get some (I'd probably do the same if I didn't know her so well), when I didn't do either she had to try something else. She's actually a very sweet girl, and I don't mind spending time with her as a friend, but there is a LOT of emotional baggage going on there. Don't know if I'd want to get all tangled up in that for a fuck buddy though...yikes!
PS I hate when I hit backspace and for some reason my browser goes to the previous page and I lose everything I just typed...GRRR!