onsounding

On-sounding, or urethral sounding, is the practice of inserting slender, smooth sounds into the urethra. In medical contexts, sounds are used to dilate narrowed segments of the urethra or to examine the urethral tract under sterile conditions; in sexual subcultures, sounding is performed for arousal, sensation, or body modification.

Equipment and technique: Sounds come in various lengths and gauges and are typically made of stainless steel or medical-grade silicone. They are sterilized before use and used with appropriate lubrication. In medical settings, a trained clinician performs the procedure with proper aseptic technique. In consensual sexual use, individuals may perform solo or with a partner, inserting slowly along the urethra and stopping at any sign of pain or resistance. Sharing equipment is discouraged to reduce infection risk.

Safety and risks: Urethral sounding carries risks of urethral trauma, bleeding, infection including urinary tract infections, and in severe cases perforation or urethral strictures. Risk is increased by forceful insertion, rough handling, improper sterilization, or preexisting urethral conditions. Medical consultation is advised if there is unusual pain, fever, blood in urine, or signs of infection.

History and notes: The practice has roots in urethral instrumentation within medical contexts, while in contemporary use it appears largely within sexual and BDSM communities. It is not universally adopted within medical guidelines, and safety and informed consent are emphasized by practitioners.