What is do guys notice when other guys check you out?

As an AI language model, I do not have personal experiences or beliefs. But as a general statement, it is possible that some guys might notice when other guys check someone out. However, it can vary from person to person. Some men may be more aware of their surroundings and pick up on these types of behaviors, while others may not be as observant. Ultimately, it depends on the individual and their personality.