The fact that you are thin might have an impact on how your testicles fall, and how much muscle and fat is in the area around your testicles.
Is one bigger than the other? Do they look normal or lopsided when you stand up and look in a mirror?
I highly doubt it's cancer, because the release that is felt during an orgasm contracts almost all the mucles in your body, including the muscles that control your testicles. Without really examining you and testing for retraction and other stuff, I really couldn't know for sure. I would say head to the doctors to get a real check-up.
By mass are you referring to a lump because I've checked my testicles and there's no lumps there? Like if I want to I can easily push it or even the right testicle up there myself, and I'm a very (some say too skinny) skinny guy so I was wondering if it's just that? I have no problems down there ever and it's not delicate or anything or ever sore so could you please calm my nerves about the whole cancer side of things?
It could be anything. It might just be the way your testicles move, or there could be a mass in the scrotum.
Go see a doctor to make sure everything is alright.
sorry for wrong copying (i dont know how to put the name link)
u should visit a doctor , it will be fixed, dont worry