This video is from the UK company that makes the SenSlip, a manufactured artificial foreskin designed to protect the mucosa so it will shed the keratinized skin. The SenSlip is a fast fix to de-keratinize the penis. Using the SenSlip is useful to quickly show men the benefits of covering the penis with a foreskin by letting them experience more sensation. Many men decide that it is worth the time and effort to restore their foreskin (growing new skin) by applying tension.

YouTube video: Explanation of Foreskin with Computer Animation