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→Why two layers?: Wikify.
== Why two layers? ==
The double-layering of the [[foreskin ]] allows the delicate [[ridged band]], which normally is safely hidden from view, to be deployed on the upper surface of the penile shaft during [[erection]]. There it stands a better chance of being activated. Double-layering also eases vaginal entry by offsetting the frictional resistance of erect [[shaft skin]].
== Summary ==