Urethral sounding is a medical procedure or practice that involves inserting a specialized instrument, called a sound, into the urethra primarily for medical purposes such as dilation or to obtain access to the bladder, but it can also be done for personal exploration or sexual pleasure. It's important to ensure that the practice is done safely and hygienically to avoid risks like infections, injury, or urethral damage, and it's advisable to consult with a healthcare professional before attempting it.