I don't mean full-out brawls since technically the majority of men are physically stronger than the majority of women.
But I hate it when guys are all "I gotta be the bigger man; I can't even tap you with my fist cause you'll break." Then women, I think, have the right to castrate men. ):
But chivalry kind of does exist! (:
A guy gave up his bus seat so I could sit when the bus was packed once. I found that kind of polite.