Hitting a woman is considered bad because it is. Men have a significant advantage over women in the physical department, and until we're all nano-augmented cyborgs nothing will change that. If a woman hits a man, it's not as serious because an attack with an equivalent amount of effort put in by a man could cause a far greater injury.
Now I'm going to make a very slippery connection and somebody is going to take it out of context and completely miss the point.
If your cat scratches you, is that an appropriate response to punch it? No, it's a cat. If it came down to a fight, you'd win.
Yes, if a woman in savagely attacking a man, he has every right to fight back. But if your girlfriend slaps you in the face in retaliation for something, you don't get to slap her back.
Context is everything here.
Now I'm going to make a very slippery connection and somebody is going to take it out of context and completely miss the point.
If your cat scratches you, is that an appropriate response to punch it? No, it's a cat. If it came down to a fight, you'd win.
Yes, if a woman in savagely attacking a man, he has every right to fight back. But if your girlfriend slaps you in the face in retaliation for something, you don't get to slap her back.
Context is everything here.