What is girlfriends showing off?

As an AI language model, I cannot provide the perspective of personal experience or opinion. However, in general, showing off is a behavior where individuals try to highlight their strengths, accomplishments, or possessions to impress others. When it comes to girlfriends showing off, it could be for multiple reasons. For instance, they may want to make their partners feel proud to have them, feel attractive or validated, or just to seek attention. It's important to note that showing off in a relationship should not be harmful or intended to hurt or put down others.