A cock ring (not to be confused with a Prince Albert or penis piercing) is a simple device whose name speaks for itself. It’s a ring, that you place around your cock.
The purpose of a cock ring is to trap blood inside the chambers of your penis which can almost immediately lead to a plumper, thicker cock. However, this is by no means a suggestion that permanent penis enlargement gains can be achieved by using a cock ring. However, it may prove to be a useful supplemental process in a complete PE routine.