Cockring, Jelly

What is a ring for the penis (cockring)?
A ring for the penis, as this cockring, jelly, is basically a ring that fits around the penis. Can fit both in the base of the penis, around the two testicles and the base, how can you have two rings to separate the testicles from the base. There are also rings for penis made to fit only around the testicles, and some men choose to use a combination to enhance the experience.

Why is it that the rings for the penis and enhance the pleasure?
Any erection is due to increased blood flow in the penis. The rings for the penis are designed to restrict the flow of blood out of the penis, which allows the user to maintain a harder erection, and often for a longer period of time. This produces, in most cases, the best results both for the user and for the partner. In addition, many report a better feeling during the act, and an orgasm is much more intense.