In children, the foreskin usually covers the glans completely but in adults it may not. During erection, the degree of automatic foreskin retraction varies considerably; in some adults, the foreskin remains covering all or some of the glans until retracted manually or by sexual activity. "Just as the clitoris is covered by the prepuce (clitoral hood) to keep it sensitive and protected, so is the glans (head of the penis) covered by the prepuce (foreskin) to keep it sensitive and protected. What does the foreskin of the penis do? Multiple important things, including these sexual, sensory, and protective functions.