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The [[foreskin]] evolved over many thousands of years in men and animals to provide protective functions that enhance survival. It provides protection to the penis from [[trauma]] and [[infection]]. Its presence prevents [[meatal stenosis]] and [[keratinization]].
Nature provides two means to retraction of the [[foreskin]] during the developmental period. 1) The inner surface of the foreskin is fused with the underlying [[glans penis]] by a common [[synechia]] to prevent retraction. Forcible retraction will tear the synechia so should be avoided. 2) The Nature provides a second method is provided to prevent retraction by making the tip of the immature foreskin is too narrow to pass over the [[glans penis, so a second method is provided to prevent retraction]]. The first person to retract a boy's foreskin should be the boy himself.<ref name="Wright1994">{{REFjournal
|last=Wright
|init=JE