Foreskin is the most densely nerve- laden part of the penis, containing 240 feet of nerves and 20,000 nerve endings. The foreskin contains dense concentrations of Meissner’s corpuscles, which are special nerve endings especially sensitive to light touch.
These highly specialized nerve sensors are one reason why genital cutting is so painful to an infant. The foreskin also contains Langerhan’s cells, which act as sentries to alert the immune system to invading bacteria and viruses.
As a protective cover, the foreskin acts in the same way the eyelid functions. It keeps a sensitive area covered, but retracts as necessary. Scientific research is always making new discoveries. It is presumptuous to assume the foreskin is an unnecessary “flap of skin.”