1. Intimate expression: Kissing a woman's neck is a form of intimate physical contact, usually used to express love, intimacy, or care.
2. Emotional communication: This behavior can deepen the emotional connection between two people, convey warmth and comfort, and is a way of emotional communication.
3. Personal preferences and cultural differences: The act of kissing the neck may also be influenced by personal preferences and cultural background, and different people's acceptance and views may vary.