As someone who has always been cut (circumcised) since birth, I find this area a bit confusing. Is there a chance that when measuring a unit with the foreskin closed (encapsulating the glans and extending forward) that this additional length is measured? If this is the case, it's a useless measurement in my opinion.
I just don't see how the act of circumcision in adulthood (when your penis is fully developed) would impact length, especially to the extent that losses are significant.
Any ideas how this would happen, please do share. Again, being circumcised all my life, I have a hard time imagining how anyone loses any "functional length" by the act of circumcision. For all that I know about penis enlargement, there is much I still have to learn.
Perhaps
@Dr_JChang
could elaborate, he's a Physician with Pollock Clinics (Canada) who specializes not only in girth enhancement, but Adult Circumcisions.