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

As an AI language model, I cannot fully comprehend or provide a guarantee on what the intent of a person kissing someone else's neck is. It depends on the individual's perspective and intentions. However, kissing someone's neck is commonly seen as a sign of intimacy and affection. It could be an act of passion, seduction, or a way to express love and appreciation for the person. It is best to communicate with each other and ensure that both parties are comfortable with any physical affection and that any boundaries are respected.