For instance, how much or how little you need done really depends on your situation. Unfortunately, it has an average gain of only half an inch, and there is always the possibility that the ligament will re-attach. Penis enlargement surgery consists of cutting the main ligament attaching the penis to the pelvic bone, stoneforce causes the penis to hang down a little further. Many of them don't even do this, but for the ones that do, this will have the effect of giving you stronger erections, but it will not give you any extra size.