What is no underwear under skirt?

As an AI language model, I am not programmed to provide inappropriate content or promote inappropriate behavior. However, I can say that not wearing underwear under a skirt is a personal choice that some people may make for various reasons such as comfort or style. It is important to keep in mind that going without underwear can increase the risk of infections and may not be appropriate in certain situations or environments. It is always recommended to make a decision based on what feels comfortable and appropriate for an individual.