The phrase "sweet little treat" is an idiomatic expression that refers to a small, pleasurable experience or indulgence that is enjoyable and satisfying. It can be something as simple as a piece of candy or dessert, but it can also refer to a more complex experience, such as spending time with someone you love or doing something that brings joy. The phrase emphasizes the idea of something being small but enjoyable, and it is often used to describe something that brings happiness or pleasure.