You cannot have sexism against one gender without sexism against another.
Women as objects leaves men without permission to develop relationships of depth.
Women as emotional (and that is weak/wrong) leaves men without a form of healthy emotional expression.
Women as stay at home housekeepers and nannies means men must earn all the money and be less involved with their families.
‘Girls’ can’t work at the executive level means all of the strengths of women are removed from essential decisions and corporations suffer.
Women must do women’s work means men cannot choose any job they want either.
When one gender is oppressed, we are all oppressed.