a friend of mine had a double hernia and was a rush to the op room job and i went with him to the hospital and before going in he was asked to sign a form saying that they could take one of his balls if needed...
... lets just say it took some convincing to get him to sign, as it was a very unlikely chance they would have to do it..
but his balls are fine and he laughs about it now saying it was the hardest thing he has ever done