The strong metal gives this probe a tough look and makes 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 head of the penis and G-spot. Sounding stimulates these nerves directly, providing a great sexual stimulus for the braver among us. Please note: inspect, wash, disinfect, sterilise. Play safely.