What is do guys like being called sweetheart?

As an AI language model, I don't have personal experiences or preferences, but generally speaking, not all guys like to be called "sweetheart." It really depends on the individual and the context of the relationship. Some guys may view it as a term of endearment and appreciate the affectionate gesture, while others may find it too cheesy or even emasculating. It's important to gauge the person's reaction and communication style before using terms of endearment, as it can help to avoid misunderstandings or awkward situations.