Use_Imagination_here said:
Men shouldn't hit women WHY. Answer the question because you certainly haven't so far.
The same reason it's a generally accepted creed that adults shouldn't hit children. "Oh, but what if the child is unusually large and mighty, and the adult is a dwarf?". It's just not very interesting to go searching for exceptions, and worse still it makes the person doing it sound like a dangerous lunatic.
You don't hit people smaller/weaker than you because A) hitting is dangerous and B) it becomes measurably more dangerous the larger the size/strength disparity between you and your target. If my girlfriend punches me with her little weiner fists and noodle arms, she'd need to get pretty lucky to do damage. I could easily
seriously hurt her with a return blow. And I'm not even a particularly huge or martially dangerous man. I just have a significant height/weight advantage.
I went to school with a guy who was a golden gloves boxer. He was held to a different standard than other kids. He wasn't ALLOWED to just blow off steam and have a stupid school fight, and when he did, and the inevitable result occurred, he was arrested. "He started it" didn't stand up as a legal defense, and it shouldn't ever really be justification for battering someone smaller, weaker, or less skilled than yourself.
Obviously there are exceptions to everything in life, and obviously a good motto is just "don't hit period" as opposed to "feel free to cut loose if someone is bigger than you", because as discussed hitting is dangerous and no one merits an unprovoked beating just because they happen to be large and strong. I just don't find it particularly intellectually stimulating to try and establish hypothetical situations in which I might strike a woman and get applause from onlookers. Is it possible that some ropey, hard core woman could light into me with such ferocity and persistence that I would be forced to reply with a blow? Certainly. Is it LIKELY? Obviously not.