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Circumcision is the removal of a simple fold of skin (the `foreskin' or `prepuce') that covers the head (glans) of the un-erect penis. The amount of this skin varies from virtually none to a considerable amount that droops down from the end of the flaccid penis. In male babies the foreskin is lightly attached to the penis underneath it, much like the skin on an orange, and comes free over the course of the first few years of life. By this analogy the foreskin can be readily separated from the main body of the penis at the start of a circumcision. A variety of methods are, moreover, used to remove the foreskin, and the amount eliminated can also vary, depending on technique. More on methods of circumcision later.