@Wrest this has actually been proven false throughout history. Women should never assume that just because a man is ugly, he will not cheat. I mean let's just look around at our friends and family. You want a better example let's take Prince Charles' affair with Camilla and him saying he wanted to be a tampon inside of her.
Women should never assume that just because a man is a cripple, won't mean he won't cheat either. See Stephen Hawking who couldn't fucking walk, talk, and could barely move a finger.
Even more retarded, is the assumption that just because you carried a baby for a man means he gives a fuck about how you feel (delusional).