i tried to discuss sexual selection here before. it didn't go over well. people couldn't get past the idea that hairy men are just attractive to some people and that their body hair couldn't possibly keep them warm.
anyways. that was just a specific example. i don't wanna get into this. bad taste since last time. i read jared diamond's third chimpanzee. i reccommend it. there's a big section on sexual selection.
but women participate in sexual selection as well. some women like hairy men, some don't. hairiness in men is not only a result of general familial hairiness. mostly, it is a result of expression of y chromosome traits. that is not affected by selection for non hairy females.