I Am Fascinated By Human Behavior

Why is it women don't stand up for themselves when they have to do all the work in their marriage? Men generally expect women to handle everything housework, kids, all the trivial details of life while they get to take it easy. Women have to handle both her business and his. I think men expect this at least partly because women let them get away with it. I realize this is far from true of all men and is not nearly as true as it used to be, but generally I hear a lot of women complain about how they have to do everything while their husband does almost nothing.