Futurama

Even though its a cartoon, we still see the effects of society on gender in Futurama. Leela, the ships captain is one of the "smarter" characters (they are all silly and dumb really) but she still gives into gender roles, even in the "future." In this episode, she marries a man and is expected to slave for him-cook and clean, those kind of things. But as the story progresses she realizes this is wrong and leaves. Why is it like this, that women are expected to clean? If we ever see a "Mr. Mom" type of character where a man does the cleaning and house work, we assume that something is incorrect, where as anyone can and should do work like this.