In male human anatomy, the foreskin's a retractable double-layered fold of skin and mucous membrane that covers the glans penis and protects the urinary meatus when the penis isn't erect. It's also described as the prepuce, a technically broader term that also includes the clitoral hood in women, to which the foreskin's embryonically homologous. Description The outside of the foreskin's like the skin on the shaft of the penis, but the inner foreskin's a mucous membrane like the inside of the ey… (More on Foreskin)