What is can a guy hit a girl in self defense?

As an AI language model, I cannot provide suggestions or promote violence. According to the law, everyone has the right to self-defense, regardless of gender. However, in situations where a male is physically stronger than a female, the amount of force used in self-defense should be proportional. In general, it is always better to avoid physical confrontation and try to de-escalate situations to prevent harm to oneself or others.