Foreskin
Retractable fold of skin which covers and protects the glans of the penis / From Wikipedia, the free encyclopedia
In male human anatomy, the foreskin, also known as the prepuce (/ˈpriːpjuːs/), is the double-layered fold of skin, mucosal and muscular tissue at the distal end of the human penis that covers the glans and the urinary meatus.[2] The foreskin is attached to the glans by an elastic band of tissue, known as the frenulum.[3] The outer skin of the foreskin meets with the inner preputial mucosa at the area of the mucocutaneous junction.[4] The foreskin is mobile, fairly stretchable and sustains the glans in a moist environment.[5] Except for humans, a similar structure known as a penile sheath appears in the male sexual organs of all primates and the vast majority of mammals.[6]
In humans, foreskin length varies widely and coverage of the glans in a flaccid and erect state can also vary.[7] The foreskin is fused to the glans at birth and is generally not retractable in infancy and early childhood.[8] Inability to retract the foreskin in childhood should not be considered a problem unless there are other symptoms.[9] Retraction of the foreskin is not recommended until it loosens from the glans before or during puberty.[9] In adults, it is typically retractable over the glans, given normal development.[9] The male prepuce is anatomically homologous to the clitoral hood in females.[10][11] In some cases, the foreskin may become subject to a pathological condition.[lower-alpha 1][12]