Red Ring, Green Ring

Two men are sitting in the doctor's office. One looks at the other and says, "What are you here for?"
The man replies "I have a red ring around my pecker, What are you here for?"
The other man says, "I have a green ring around my pecker."
The doctor calls in the man with the red ring first and examines him. As he walks out he tells the other guy it was no problem. The doctor calls the man in with the green ring around his pecker and examines him. The doctor says, "Your pecker is gonna fall off and you are gonna die".
The mans says, "What?? You told the man with the red ring he was ok, but I'm gonna die??" The doctor replies, "Yes but there's a lot of difference lipstick and gangrene!"