The natural foreskin - retraction and frenulum
Video
Educational video edited and used by IntactWiki with kind permission of its author, a foreskin educator.
This is the normal foreskin that all men are born with. The United States is the only country that circumcises babies for any reason other than religion, and many men ignore that the penis they've known their whole life is missing an important part because it was removed by a doctor in their first week of life.