Guys are taught at an early age that hitting girls in unacceptable. This is backed up by the fact that a guy hitting a woman WILL go to jail.
Women are under no such conditioning against violence against other women, particularly women who see themselves as men.
but usually not the reverse....a friend had a vase broke over his head....he picked up a small piece and flung it back at here striking her and scratching the skin...
he was charged(charges dropped once the wife sobered up but the dyke DA did not want to drop them)....he lost his pistol license...she was never taken to task for her action.