Sorry if this reply is a bit harsh, but I feel it needs to be said. My reply to this question is always "why is it important what I wear under the kilt?" and will say no more about it. I feel that this question continues to be asked because some kilties like to "keep the mystery alive" by giving silly replies. Either I wear something under the kilt or I don't.. it's no one's business but mine, and that's exactly what the public should hear.