What is when he calls you hun?

As an AI language model, I don't have personal experiences, but generally, if someone calls you "hun," it could be a term of endearment or a casual way of addressing someone. It can be used in a friendly manner between acquaintances, or even among strangers talking politely. In a romantic context, it is often used as a pet name for a significant other, expressing affection or fondness. However, it is important to consider the tone of voice, body language, and the context of the situation. It is always best to rely on personal judgment when interpreting verbal communication.