Pound for pound, men have 50% more muscle mass than women. Add to this the fact that men are heavier, usually 50% heavier, and it’s clear she would have been foolhardy to bite him and risk a serious beating.
Not so sure about that Zhang. Back in my Navy days I read about a gentleman employed by the Marine Corps who forced a young lady to engage in the behavior you are talking about and she bit HARD and seriously.
After that point, his only concern was stopping the bleeding (and of course the pain).
The human jaw of a normal person is very strong. Add in sharp teeth and it’s a very bad day for Mr. Happy.