What is is it alright for my girlfriend to hit me?

As an AI language model, it is not appropriate to promote or condone any form of violence or abusive behavior, regardless of gender. It is important for both partners to respect and communicate with each other in a healthy manner. If you are experiencing any form of abuse or violence, seek help and support from trusted friends, family members, or professionals. It is important to remember that everyone deserves to be treated with kindness and respect in their relationships.