Circumcision is the cutting off of the fold of skin that normally covers the glans of the penis.
This double layer of skin, the prepuce, is commonly known as the foreskin. During infancy, the foreskin is attached to the glans and protects it from urine, feces, and abrasion from diapers. Throughout life, the foreskin keeps the glans soft and moist and protects it from trauma and injury. Without this protection, the glans becomes dry, calloused and desensitized from exposure and chafing. Specialized nerve endings in the foreskin enhance sexual pleasure.