Have you ever thought about what it means to hand someone access to the deepest part of your body, literally? Some fetishes play with skin. Others play with the mind. And then there's sounding, which plays with one of the most intimate, most sensitive, and most unprotected parts of your anatomy: the urethra. This isn't a practice for someone looking for a new "thrill." It's for someone who wants to surrender absolute control over something no one has ever touched before.