The foreskin, or prepuce, is a fold of skin that covers the glans penis when the penis is uncircumcised. Most male mammals either have a foreskin that covers the glans penis or a sheath in which the whole penis can retract.
The foreskin, or prepuce, is a fold of skin that covers the glans penis when the penis is uncircumcised. Most male mammals either have a foreskin that covers the glans penis or a sheath in which the whole penis can retract.