Man comes in with the doctor, pulls down his pants to show the doctor one of his balls went completly blue
Doctor: myeah, we will need to amputate that ball
Man comes again the next week, pulls down his pants, this time its his other ball that went completly blue
Doctor: myeah i'm sorry but we will need to amputate the other ball too
Man comes back again a week later, this time the whole area around his privates went blue, man asks doctor "now what, what could this be"?
Doctor: AH, now i get it!
man: ah?
doctor: it's youre jeans thats giving off