This is summarizing the average experience, not for all patients. Some of us are MUCH, MUCH WORSE after surgery and it sometimes happens immediately, well before the tunica shrinking theory even has a chance to occur. Mine was being pulled up inside me to the point of pain if I bent over or sat down. Several Inches were lost instead of just centimeters. Aggressive therapy after the surgery was to no avail. It took another major surgery to fix what the original surgeon did to me.
I would suggest that the penis will shorten after a prostatectomy by the diameter of the removed prostate. That was my experience. And no exercise or instrument can ever replace it.
