So far, what I heard from my Dad. Yeah, my dad. He practice Chinese Penis Hanging thing when he was in his twenties. He has a significant gain in length and girth. He said it's more like a workout and if you do it correctly, you can easily gain length and the strength of lower body. His girth was 4 inches originally. After hanging, he is around 6.5 to 7 inches. I am thinking about getting a BIB hanging for myself and start hanging.