Circumcised cock frenulum edgeing and play
I use my Calvin Kleins to lift my balls to loosen the skin a bit and play with the back of the cock and head using the the frenulum till I come. In this *******position, when the cock is flaccid, the skin wrinkles a lot. Even on the shaft, the 'frenulum' starts to get more sensitive, and has become more prominent over the years.