I think you need a woman to weigh in here, and as a woman I say Yes, a guy should be able to defend himself. If the guy is a great deal stronger there's no reason why he can't "pull" his punch so to speak and still get the message across that if you're going to be violent, expect violence in return. Though unless you get a situation like @craig-grant where the female is showing her true colors, women do tend to be favored. And it's unfortunate, because there are definitely times where a girl should get a wake-up call. And if a girl is stronger and picks the fight? It should not be a gender thing. My opinion? The woman in the video is an asshole. (See the masculine slant on my insult? :) ) And an embarrassment to my gender as a whole.