Clamping

Clamping is a technique that uses a constricting device, such as a shoe string, cable clamp, or a tight cock ring. The clamp is firmly tied, clamped, or put, respectively, on the base of the erect penis while "edgeing" (extended masturbation) with a firmly erect penis. Extreme caution should be used to prevent permanent damage to the tissue. Use of a metal cock ring is not advised because trapped blood engorging the penis can make it impossible to remove.