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* Protective function: In small children, the glued foreskin protects the glans from the excretions in the diaper. Throughout life, the foreskin keeps the glans soft and moist and protects it from trauma, injuries, environmental influences, friction and dehydration.
* Sexual functions
** The foreskin contains numerous delicate nerve endings. Together with the sensitive surface of the glans, the inner foreskin, which is retracted and turned outward during an [[erection]], forms an extensive and highly sensitive erogenous zone, which is important for normal, intense feeling during sexual intercourse and masturbation.
** The foreskin prevents unnecessary friction during sexual intercourse with a special sliding effect and increases the sensation of pleasure in men and women.
* Immune system: Specialized cells in the foreskin form substances that fight and kill pathogens. However, research into this function is still in its infancy.