Im 18 and i have klinefelter from which my shoulder width never really developed. I really dont want to look like a 15 year old Boy my whole life so i Need clavicle lengthening surgery, and please DO NOT say that i just have to Train my delts, my shoulders are naturally narrow so Training wouldnt really Change anything, even if i would put on a lot of mass it still would look asymmetrical because the shoulders will always look like there are compressed on the ribcage.