Honestly, this is why I get most pissed off at the "Don't hit girls!" crowd. While I personally avoid fighting when I can, there are those who will not. If you raise women with the expectation nobody will raise a hand to them, even in retaliation, they'll get their shit kicked in hard at some point.
I haven't hit a woman in well over a decade, but I remember it was basically because of this. She scratched my arm because of some bitchy reason or another, literally gouges, I still have the scars, I told her to fuck off or I'd deck her, she tells me "Boys can't hit girls!" and "Go cry to the teacher like the baby you are" (I was 1-2 years younger than the rest of my year, skipped a few grades), and tries to scratch me again. I elbow her on the temple, she falls over, and just sits there dumbfounded like she can't believe it happened.
Fucking absurd. Everyone should avoid fighting. Women more so than men because they're more likely to lose. Raising people with the idea they're invulnerable is fucking retarded.