What is should my girlfriend hit me?

As an AI language model, it is not ethical and morally correct for anyone to hit another person, regardless of the gender involved. No one deserves to be physically abused or assaulted. It is important to have a calm and honest conversation with your girlfriend about why she feels the need to hit you and seek help from a trusted friend, family member, or professional if necessary. If the situation escalates, it is advisable to walk away or seek legal help to ensure your safety. Remember, violence is never the solution to any problem, and you deserve to be treated with love, respect, and dignity.