Therefore, when your son grows up, there may be a decreased risk of cancer of the cervix in his sexual partners if he has been circumcised. Skin cells from the glans of the penis and the inner foreskin are shed throughout life. They escape by working their way to the tip of the foreskin. These escaping discarded skin cells constitute infant smegma. At puberty, Tyson's Glands produce an oily substance, which when mixed with shed skin cells, constitute adult smegma.
Adult smegma serves as a protective, lubricating function for the glans.
The foreskin acts as a cover for the glans and produces smegma for a protective coating. This is particularly important if wet diapers are left on too long, since decomposition of the urine can cause irritation of the glans if it is not coated with smegma. When mammals reproduce, smegma is deposited. If smegma contained a carcinogen or even an irritant, then the propagation of the species would be jeopardized. No such phenomenon exists.