Until I was about 16 I only cleaned my unit in the shower flaccid. At some point I realized I've never been erect and exposed my foreskin at the same time. So out of curiosity, while erect I peeled my foreskin back but it hurt a lot so I couldn't do it in one day. So every other day when I remembered out of curiosity again, I pulled back more and more (this was very painful but I was determined to achieve an erect exposed penis) After so many tries I had finally done it, feeling a stretching feeling around the base of the tip and foreskin. Until my erection had gone away. I proceeded to do this until it no longer hurt, and what I now imagine must have stretched my girth by a bit. 5.5" before discovering this sub. Its possible I forced my foreskin to adapt/stretch to a new normal.

Obviously it can't be recreated for everyone and infinitely but I wanted to share that here.