This 100% silicone teardrop style c-ring stimulates the perineum giving you an external prostate massage while constricting your testicles and penis. The silicone is firm yet has elasticity and if lockup occurs (penis engorged yet you can't ejaculate) you can easily sacrifice the silicone instead of calling on paramedics for the "jaws of life". The C-Sling is great for using during partner sex and great for using as a solo toy for masturbation. Put a little lube on the inside of the ring and place both balls through before your penis. The tongue is designed to face towards the anus but it can also be used facing forward to cup the testicles.