Most of the time, when women are being bitches to each other, it's usually caused by jealousy over a guy - ie, one of the women has a man, or is at least getting sex, and the other woman isn't and feels unattractive, and so she then feels compelled to act like the other girl is a slut, even though she wants to get laid just as much. It's so stupid.

I love being a girl, but damn, we act like crazy broads sometimes.