A man takes his regular trip to the doctors. To his horror, his doctor tells him he has acquired AIDS. The patient asks what he should do, if he can be cured. The doctor simply tells him to eat bran foods, prune juice, anything to get the poo flowing. So the man does exactly as the doctor tells him.
A month later, the same man comes back to the clinic. With confidence he may be cured, he asks the doctor. The doctor laughs and says, "No, I just wanted you to know what your ass was for!"