Because women have a childish and insecure nature. They're like children who want you to share your toys with them, but want to keep their toys to themselves. Also, feminism has cultivated a selfish attitude in a lot of women and has caused them to become unreasonably demanding and preoccupied with their own self fulfillment while ignoring the needs and rights of men. It has also deluded many women into thinking that it's o.k. to use the coercive power of the government to impose THEIR rules on men.