How the Foreskin Works

This shows a man's foreskin being retracted passively, as for cleaning. The action in
erection and intercourse is similar (without the wrinkling).
Page duplicated from:  http://www.circumstitions.com/Works.html
Circumcision destroys this whole extraordinary structure and function. It always removes most
of the nerve-packed ridged band, and often all of it.

Videos (flv) of a real foreskin being retracted in a similar way