What is the main cause of feminism in men?

A lot of young men call themselves feminists because they like the label. It's socially acceptable to call yourself a feminist, and it makes them feel like they are progressive or sensitive or whatever. The ironic thing is that these guys have utterly no clue what they're talking about. They have never bothered to research feminism, so they don't realize that they're allied with a bunch of bigoted misandrists. Most of the time, male feminists are ignorant people trying to identify with a socially popular movement.