Cock Rings come in many various shapes and materials. A cock ring binds the penis and testicles, trapping blood in the penis, making for a larger, firmer and more sensitive erection.
Cock rings can be adjustable, or non-adjustable. Ones that are non-adjustable go on after erection, and adjustable ones go on before erection. Beginners should start with adjustable cock rings, as non-adjustable ones can only be removed after the erection goes down.
It is not recommended that cock rings be worn for long amounts of time, or used by anyone with vascular diseases. Cock rings may damage capillaries and bruise if worn too long.
If at any time the ring is uncomfortable TAKE IT OFF!