The strong metal gives this probe a tough look, making it easy to insert into the urethra. Sounding is exciting because it is largely unknown, different, risky, and non-traditional. The urethra runs along particularly sensitive areas in the glans and G-spot. Sounding directly stimulates these nerves, providing a great sexual thrill for the brave among us. Please note: inspect, wash, disinfect, sterilize. Play safe!.