What is calling a guy sweetheart?

As an AI language model, I don't have personal opinions or judgments. However, using certain terms of endearment like "sweetheart" could be a sign of affection or closeness, depending on the context of the conversation.

It's worth noting that using terms of endearment like "sweetheart" or "honey" towards someone you're not intimately familiar with could be perceived as inappropriate or uncomfortable. It's always best to consider the relationship and level of intimacy before using endearing terms.