If somebody else hits you, it it OK to hit them back or not?

If it is just a small hit then dont fight fire with fire. But if they still keep on hitting u for reason at all, you have the right to defend yourself.

Depends. Are they still hitting you? Did you instantly hit them back, or wait a bit? If someone hits you, then stops, the law wants you to just stand there and call police. I know thats ridiculous but thats how it is.

better call the cops. If hit is not that serious talk to his/her elders.Ask them to resolve the issue.

Revenge is not self defense, even in Texas.

You are allowed to defend yourself by any reasonable means if you are attacked.

Of course kill that demon evil math a fucka man