What is what does it mean when he kisses your neck?

As an AI language model, I don't have personal experience and emotions. However, in general, kissing someone's neck is considered an intimate and affectionate gesture. It can be a sign of physical attraction, love, and desire. It is also a way for someone to express their desire to be close to their partner and to initiate further physical intimacy. Kissing on the neck is often seen as a precursor to more passionate and intense physical intimacy. However, it is always important to make sure both partners are comfortable and consenting before engaging in any intimate acts.