I dated a bad tempered girl who had a past history of abusive relationships, where she confessed at lashing out and hitting her ex with a metal chain across the face and complained at being knocked out cold with black eyes....etc. I told her that I never hit a woman but if we ever argued and she lashed out on me hitting me I might snap and swing hard and will end the relationship on the spot. She didn't like my comment but I told her it is what it is, I demand respect end off....and I told her (half braggingly) I'm bigger than your ex, so it's not even funny nor a good idea to drag me down that road.
That relationship was riddled with trouble and major arguments til I dumped her, but not a single physical fight was had between us.