Men think they have all the power over women.
You must be thinking of the last century, and not even the last couple of decades in it.
If you spend money on a woman than she has power over you because our cultures still afford women this preference based merely on their sex.
If you go to divorce court, you'll find out how little power men have compared to womens'.
If a woman decides where and when to have sex, she has power over you.
In a workplace men have to watch their words with a woman who can intentionally reinterpret what you meant not to mention affirmative action in hiring and promotion power.
Women have literally hundreds of 'women-only' organizations; men are not permitted men-only clubs.
Women have emotional power whereas men are looked down upon when using theirs.
Women understand this even if you still have some old fashioned idea of this.