While there are a number of differences between circumcised and uncircumcised penises, medical studies have shown that men with both circumcised and uncircumcised penises have satisfactory pleasure during sexual intercourse. However, the foreskin works in a number of ways to maximize the sensitivity of the penis and to maximize pleasure during sexual intercourse, oral sex, and masturbation. * The foreskin functions to protect the sensitive glans (head) of the penis, keeping it moist and protecting it from rubbing against clothing, which can slowly desensitize the glans. * The foreskin itself is also very sensitive and rich with nerve endings, making it very sensitive to stimulation. The inner foreskin and frenulum are the more sensitive parts of the foreskin. *The foreskin works to facilitate a natural sliding motion during sexual intercourse and masturbation. The foreskin slides up and down on the head of the penis, which not only stimulates the foreskin itself, but also provides additional stimulation to the head of the penis. The natural motion of the foreskin also allows masturbation without the use of additional lubrication. While sex is certainly pleasurable for both circumcised and uncircumcised men, the uncircumcised penis is fully equipped to receive the maximal stimulation provided by sexual intercourse, oral sex, and masturbation.