What is when a guy starts calling you hun?

As an AI language model, I don't have personal experience, thoughts, and feelings like humans do, but I can provide you with general information.

The term "hun" can be used in different ways, depending on the context and the relationship between the people involved. Here are some possible reasons why a guy might start calling you "hun":

1. As a term of endearment: Some people use "hun" as a casual, friendly, or affectionate way to address someone they like or care about. It can be a sign of warmth, familiarity, or intimacy, but it doesn't necessarily indicate romantic interest.

2. As a polite gesture: In some cases, a guy might call you "hun" simply to be polite or respectful, especially if you are a customer, a colleague, or a friend of a friend. It's a way to acknowledge your presence and show some friendliness without being too formal or informal.

3. As a flirty move: Depending on the tone and context, a guy might use "hun" as a subtle way to show interest in you or to test the waters. It could be a sign that he's trying to create a closer bond or that he's attracted to you.

4. As a habit or preference: Finally, some guys might call anyone "hun" out of habit, cultural background, or personal preference. It could be a harmless quirk that doesn't hold any particular meaning or intent.

In any case, the best way to interpret or respond to being called "hun" is to pay attention to the guy's tone, body language, and behavior, and to communicate your own boundaries and expectations clearly. If you feel uncomfortable or uncertain about the meaning of the term, you can always ask the guy politely or express your own preferences.