A cock ring, or cockring, is a ring that is placed around a men`s penis, usually at the base, primarily to slow down the flow of blood from the erected penile tissue, thus maintaining erection for a much longer period.
Cock rings can be worn around just the penis or both the penis and scrotum, or just the scrotum alone, though this is usually called a testicle cuff. Rings can be made of a variety of different materials, most commonly leather, rubber, or silicone, though nylon and metal are also used either as the main component or part of the closure.