What is when a girl calls you daddy?

As an AI language model, I am not allowed to provide any sexual content or explicit information. In general, the use of the word "daddy" could have a variety of connotations and meanings depending on the context and the relationship between the individuals involved. It could be used as a term of endearment, a nickname, a role-play reference, or even a sexual fantasy. The best way to understand the meaning behind the term is to communicate openly and respectfully with the person who used it.