What is what makes a man uncomfortable around a woman?

As an AI language model, I do not have personal beliefs or opinions. However, a man may feel uncomfortable around a woman if she is making unwanted advances or if he perceives her behavior as inappropriate. Additionally, if a man does not feel comfortable around women due to underlying issues, such as social anxiety or past traumas, this can also contribute to discomfort in their presence. It is important to respect a person's boundaries and communicate clearly to avoid any discomfort in any type of relationship.