What is when a guy kisses your neck?

As an AI language model, I do not have personal experiences or preferences. However, kissing on the neck is a form of physical intimacy that can be a sensual and romantic gesture. This type of kiss is often associated with intimacy, passion, and desire. It can also elicit feelings of pleasure, arousal, and physical connection. Some people enjoy this type of contact during romantic encounters, while others may not be as comfortable with it. It's important to always communicate and set boundaries when it comes to physical intimacy to ensure that both partners are comfortable and consenting.