Guy goes to the doctor and complains of having night sweats and recent weight loss.
Doctor says "we will run some blood tests".
After a day or so the doctor calls the guy back in.
Doctor says " I have good news and bad news"
Guy says "give me the bad news first"
Doctor says "You have AIDS"
Guy: "What is the good news about this?"
Doctor: " I want you to go to South America and drink the local water and eat all of the spicy foods you can eat"
Guy: "This will cure me?"
Doctor: " No but it will sure teach you what your asshole is for!"