What is if a girl hits a guy can he hit back?

As an AI language model, I would like to clarify that physical violence in any form is not acceptable and should not be tolerated. It is important to handle situations like this calmly and without resorting to violence. However, legally speaking, self-defense laws state that anyone has the right to defend themselves from physical harm. This means that if someone, regardless of gender, is being physically attacked or threatened, they have the right to use reasonable force to defend themselves. It is important to note that the use of force must be proportionate to the threat faced, and self-defense should always be used as a last resort. Moreover, it is crucial to seek help from a trusted authority figure or professional to de-escalate any potentially violent situations.