I'd never hit a woman, even if a woman is hitting you, a man should be able to refrain her without using violence. I would never allow a man to hit a girl either, if i saw someone hit a girl, i'd go up and punch them in the face.
BUT, you know those manly women? The ones that do boxing and shit and then they think they are top shit and can beat the fuck out of any guy. Well i don't class them as women. Ofcourse i'd still refuse to hit them unless it was absolutely needed, but then if i did, i would not be holding back, i'd knock their fucking jaw off. Because those types just give me the shits, they are like 'i do boxing, i can beat up any guy!', its like 'i do boxing too, so what makes you so much better than me you dumbass bitch?'.