RE: Is a man allowed to defend himself if assaulted by a woman?

Everyone has the right to defend themselves right? If Tom Hits Joe because Joe kicked Tom, then Tom had the right to defend himself from getting hurt anymore. The same rule goes along if Holly hits Jessica and Jessica decides to defend herself. Now, If Holly decides to physically hurt Tom, Tom has the right to prevent her from causing anymore harm to himself. I do not understand why you said special right, everyone can defend themselves