It doesn't make complete sense, you're right. I think it's just a poor way of describing that it's a bit more general than people sometimes assume - but also something that some girls don't really realise they are doing. Take a girl who dresses up the nines to go clubbing - "for herself" - she wants to look hot enough to bang, but that doesn't mean she wants to bang anyone particularly. But no one wants to be rejected, even if they're not looking for anything - it would bother a lot of girls if she walked past a bunch of sex-hungry men (not saying all men are like that, you know the type I mean at clubs) and they didn't bat an eyelid. It doesn't mean she's a power-hungry, egotistical bitch who wants to tempt men and then let them down. She just wants confirmation she's attractive to the general public, so when she does meet someone she likes, when she is in the mood for something, she feels confident from general approval that she has a chance.