Why should women be slaves to men?

Are you talking about women in feudal society? I really have never seen such a thing in this society. In that society, women are like this because of the social view that men are superior to women, so even if women are unhappy, there is nothing they can do. Besides, they think it should be like this ideologically, which is related to their academic qualifications. But if there is such a woman in today's society, she is either out of her mind or too dependent on and too fond of this man, but I still think there is something wrong with her brain.