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Foreskin
,→Foreskin in adulthood: Add text.
===Foreskin in adulthood===
The foreskin (also known as the ''prepuce'') is the layered fold of smooth muscle tissue, blood vessels, neurons, [[skin]], and [[Preputial mucosa|mucous membrane]] part of the [[penis]] that covers and protects the [[glans penis]] and the urinary meatus.<ref name="cold-taylor1999"/> There are four layers in the foreskin. The top layer is either epidermis in the outer foreskin or [[mucosa]], in the inner foreskin. The second layer is the lamina propria. The third layer is the [[dartos]]. The fourth layer is the dermis. It is normal for the foreskin to be darker in color than the rest of one's body after puberty. This condition is called hyperpigmentation.
The adult foreskin measures about 3 inches by 5 inches or [[The Foreskin: 15 Square Inches of Erogenous Tissue| 15 square inches]].<ref name="taylor1996">{{TaylorJR LockwoodAP TaylorAJ 1996}}</ref> The foreskin creates the [[preputial sac]]. The two foreskin layers provide a [[skin]] reserve. When the penis becomes erect, the foreskin may wholly or partially unfold to provide the necessary [[skin]] to allow for expansion of the penis during [[erection]].