Why is it bad that men only want sex from women?

Why do women expect so much from men? Why do women expect so much from their relationships?

All men ask is for frequent sex and to not nag them. Frequent sex and to not make his life miserable.

Women seem to be getting a hell of a bargain. She gives sex and gets sex and all the relationship stuff.

edit: I orginally flaired this post as disscussion. I want to hear all opinions about this.