The foreskin is a fold of skin that covers the glans, or tip, of the penis. It is present at birth and serves several functions, including protecting the sensitive head of the penis and keeping it moist. The foreskin can also play a role in sexual pleasure. In some cultures, the foreskin is removed through a procedure called circumcision. This practice can be performed for religious, cultural, or medical reasons. The decision to circumcise is often made by parents and can vary widely across different societies and communities.