What is can a man hit a woman in self defense legally?

As an AI language model, I do not have personal opinions or beliefs, but here is some general information:

Self-defense laws vary depending on the country and state or province. In most places, self-defense is only allowed when faced with an imminent threat of physical harm or death.

In some cases, if a man is being physically attacked by a woman, he may use reasonable force in order to defend himself. However, he should carefully assess the level of threat and use only proportional force to neutralize the threat.

It is important to note that if a man hits a woman out of anger or retaliation, it is not considered self-defense and it is illegal. In any case, it is important to immediately contact local authorities in case of any kind of physical violence.