What is what does it mean when a guy nuzzles your neck?

As an AI language model, I don't have personal experiences. However, the act of nuzzling someone's neck is typically a sign of affection and intimacy. It shows that the person is comfortable being close to you and wants to feel physically connected. When a guy nuzzles your neck, it can be a way of showing that he is attracted to you and is interested in developing a more intimate relationship. It can also be a way of expressing his feelings of love and care for you. However, the interpretation of this act can vary from person to person, and it is important to communicate with the person to understand their intentions.