An educational medical video about why foreskin exists. Why do you have foreskin? Same reasons women have clitoral hoods. (For how to care for foreskin and when it retracts see lower.) Protection: Just as the eyelids protect the eyes, the foreskin protects the glans and keeps its surface soft, moist, and sensitive. It also maintains optimal warmth, pH balance, and cleanliness. The glans itself contains no sebaceous glands-glands that produce the sebum, or oil, that moisturizes our skin. The foreskin produces the sebum that maintains proper health of the surface of the glans. Immunological Defense: The mucous membranes that line all body orifices are the body's first line of immunological defense. Glands in the foreskin produce antibacterial and antiviral proteins such as lysozyme. Lysozyme is also found in tears and mother's milk. Specialized epithelial Langerhans cells, an immune system component, abound in the foreskin's outer surface. Plasma cells in the foreskin's mucosal lining secrete immunoglobulins, antibodies that defend against infection. Erogenous Sensitivity: The foreskin is as sensitive as the fingertips or the lips of the mouth. It contains a richer variety and greater concentration of specialized nerve receptors than any other part of the penis. These specialized nerve endings can discern motion, subtle changes in temperature, and fine gradations of texture. Coverage During Erection: As it becomes erect, the penile shaft becomes thicker and longer. The double-layered foreskin provides the skin necessary to accommodate the expanded organ and to allow the penile skin to glide freely, smoothly, and pleasurably over the shaft and glans. Self-Stimulating Sexual Functions: The foreskin's double-layered sheath enables the penile shaft skin to glide back and forth over the penile shaft. The foreskin can normally be slipped all the way, or almost all the way, back to the base of the penis, and also slipped forward beyond the glans. This wide range of motion is the mechanism by which the penis and the orgasmic triggers in the foreskin, frenulum, and glans are stimulated. Sexual Functions in Intercourse: One of the foreskin's functions is to facilitate smooth, gentle movement between the mucosal surfaces of the two partners during intercourse. The foreskin enables the penis to slip in and out of the vagina nonabrasively inside its own slick sheath of self-lubricating, movable skin. The female is thus stimulated by moving pressure rather than by friction only, as when the male's foreskin is missing. Care of the Foreskin The natural penis requires no special care. A child's foreskin, like his eyelids, is self-cleansing. For the same reason it is inadvisable to lift the eyelids and wash the eyeballs, it is inadvisable to retract a child's foreskin and wash the glans. Immersion in plain water during the bath is all that is needed to keep the intact penis clean. The white emollient under the child's foreskin is called smegma. Smegma is probably the most misunderstood, most unjustifiably maligned substance in nature. Smegma is clean, not dirty, and is beneficial and necessary. It moisturizes the glans and keeps it smooth, soft, and supple. Its antibacterial and antiviral properties keep the penis clean and healthy. All mammals produce smegma. Thomas J. Ritter, MD, underscored its importance when he commented, "The animal kingdom would probably cease to exist without smegma." Studies suggest that it is best not to use soap on the glans or foreskin's inner fold. Forcibly retracting and washing a baby's foreskin destroys the beneficial bacterial flora that protect the penis from harmful germs and can lead to irritation and infection. The best way to care for a child's intact penis is to leave it alone. After puberty, males can gently rinse their glans and foreskin with warm water, according to their own self-determined needs. Retraction of the Foreskin At birth, the foreskin is usually attached to the glans, very much as a fingernail is attached to a finger. By puberty, the penis will usually have completed its development, and the foreskin will have separated from the glans.8 This separation occurs in its own time; there is no set age by which the foreskin and glans must be separated. Even if the glans and foreskin separate naturally in infancy, the foreskin lips can normally dilate only enough to allow the passage of urine. This ideal feature protects the glans from premature exposure to the external environment. The penis develops naturally throughout childhood. Eventually, the child will, on his own, make the wondrous discovery that his foreskin will retract. There is no reason for parents, physicians, or other caregivers to manipulate a child's penis. The only person to retract a child's foreskin should be the child himself, when he has discovered that his foreskin is ready to retract.

• published: 22 Aug 2011
• views: 140514