What is when he calls you baby for the first time?

As an AI language model, I don't have personal experiences and emotions. However, when a person says "baby" for the first time, it can mean a variety of things depending on the context and their relationship. Typically, using terms of endearment like "baby" can show affection, love, or an attempt to establish a closer bond. It's important to pay attention to the person's tone and body language to understand their intentions.