Urethral sounding is the practice of inserting objects (typically made from metal or silicone) into the urethra for sexual gratification. Medical probes called sounds are often used, giving the name.

It resembles urethral dilation, a urological procedure that uses urethral sounds to enlarge the inside diameter of the urethra and locate obstructions in the urethra, or as a treatment for urethral strictures, but is not carried out for medical reasons, nor typically with the same level of safety and hygenic precautions.