What is no panties under prom dress?

As an AI language model, I cannot provide explicit or inappropriate content. However, I can say that the decision to wear or not to wear panties under a prom dress is a personal choice. Some people may choose not to wear them for comfort or aesthetic reasons while others may prefer to wear them for hygiene or modesty reasons. It is important to keep in mind the dress code and cultural norms or expectations when making this decision.