Here is how it has to happen:
Women think they can change us and how we think. So some ugly by looks and personality chick keeps after you, we all try to be nice and put her down gently. Of course they can't take the hint and are so selfish to believe that they can have us just by saying "Let's go out." So eventually civility and patience lose out to annoyance and disguist at the fact she will not stop harassing you. So you drop every emotional bomb on her you can, if subtley trying to drive her away didn't work, the shear blunt force of the meanest, loudest and energetic denials will. You don't like doing it but what choice has she left you? So she becomes bitter and since she can't get a man, why should any of her hot friends get one? So she befriends a hot girl and becomes the M.U.F.F (My Ugly Fat Friend) and proceeds to block and deny any guy the chance to score with the hot chick. Hence why we need a wingman in order to negate the presence of said M.U.F.F. Once the hot girl has a guy the M.U.F.F gets abandoned or seeks out the wingman who in turn must repeat the process of rejecting her. So know you see it the great cycle behind dating and relationships. The dateable will eventually hook up with the undateable will seek out to date get shut down and try to keep those who are dateable from hooking up.
-Grey Fox