There is his old friend he hasn't seen in a while also waiting for his appointment.
Man: - It's kind of embarrassing to say but I come here because I have a blue ring around my penis.
Friend: - What a coincidence, I am here with a similar problem. I have a red ring around my penis.
Friend goes in to doctors office and comes out after two minutes, smiling.
Friend: - Doctor said I should not worry, just go and take a shower.
Man goes into doctors office and doctor takes a look at his "problem".
Doctor: - Sorry to say but I will have to amputate your penis.
Man: - But that's not what you told my friend with almost the same problem.
Doctor: - You have to understand that there is a clear difference between lipstick and gangrene.