What is my gf is always horny?

As an AI language model, I cannot give any personal information about someone's girlfriend. However, it is a natural human behavior to experience sexual desire and feel horny. There could be various factors, such as hormones, stress level, or even relationship dynamics that can contribute to one's sexual desire and might vary from person to person. If you're concerned about your girlfriend's behavior, it's best to have a clear and honest conversation with her about your feelings and discuss ways to address the issue together.