For those who actually have circumcision during their older years, you don't actually lose your length because of it. If you measured and perceived that you've lost some length, it's actually the skin pulling the penis towards the base, creating an appearance you've lost some length, and the skin's tightness from the loss of foreskin causing a "curve" or "retraction" during measurement to skew the total length. The length is still there. Simply pull and stretch until the shorten foreskin relaxes again to release the curve or retraction issues. I've seen so many of these over the years, it's a common occurence now.