Why is it okay for a woman to hit a man?  Professional Dommes do it and nobody is offended.

Why is it okay for men to hit other men?  Boxing, Martial Arts, Football, Basketball, you name it...

Why is it okay for women to hit other women?  Dykes in particular, have a reputation for being brutal during sex.  They bite, punch, etc.

Why is it NOT okay for a man to hit a woman?

Obviously, if you're here watching these fetish videos, your mind is a bit more open - or at least curious - than most.  You know as well as I, that violence towards women - consensual or otherwise - is heavily frowned upon in our society.  Any thoughts on why this hypocrisy remains?