After an argument over at another subreddit I want to ask you this:

Is there a spectrum of physical violence? That is, should people who start violence expect the person not to retaliate with their full strength?

For example, let's say that you're in a bar and someone who looks less strong than you hits you in the face. Are you expected to hit him back with little strength because he looks or is weaker than you?

Now think about the same example but imagine it's a woman. Now imagine it's your SO.

EDIT: for the record I would opt not to hit the person and later on sue him or her for battery.