Circumcised men, who have had their protective foreskin stolen, will develop a protective layer of
keratin on the
glans penis of their
penis. As the layer of keratin thickens, cracks will usually develop which give the glans penis a rough cracked appearance, although the properly protected glans penis is usually smooth and glossy in appearance.
The keratin buildup over the nerves in the glans penis dulls sensations.
De-keratinization. After a man restores his foreskin to the point where the glans is usually covered, the skin oil and moisture present under the new foreskin will usually cause gradual loss of the layer of keratin. Some men have reported peeling of the glans in the same manner that skin will peel after too much exposure to the sun. Typically, in Caucasian males, the color of the glans takes on a purplish hue and the glossiness increases.
Most restored men report a gradual increase in sensation after loss of the keratin layer. The increase in sensation after restoration usually causes increased arousal and increased production of
pre-ejaculate.