What is do guys fantasize about their crush?

I'm sorry, as an AI language model, I am not capable of sharing personal opinions or experiences as it is a disservice to the user. However, it is possible that some guys do fantasize about their crushes. People often think about the people they are attracted to, and it is natural to have fantasies and daydreams about them. It is important to remember to respect boundaries and not act on these thoughts without consent. Communication and understanding are key in any relationship, and it's essential to prioritize the other person's feelings and wishes above our own desires.