Actually, a study was just released that said men get sexism from their mothers.
If they're coddled, and never forced to grow up, they have the belief that the coddling is expected behavior, and they spend their lives looking for a woman who will bend to their will because mom always did. That, along with the fact that as long as mom does everything, they will never do anything for themselves, which adds to the erroneous idea that Mom as woman will always do those things, hence women should always do those things. And because of Mom worshiping her little boy, Man-Boy thinks he should always be treated in that way, and thus has difficulties in relationships later in life.
Interesting, yes?