Mucocutaneous boundary

The mucocutaneous boundary is the point near the orifices of the body at which the external skin stops and the mucosa that covers the inside of the body starts.

A mucocutaneous boundary is found at the lips, at the tip of the foreskin and similar locations. The mucocutaneous boundary is highly erogenous tissue. Winkelmann reports the mucocutaneous boundary is a "specific erogenous zone with rete ridges where the nerve endings rise closer to the surface. The ridged band area of the prepuce is one such example.

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