One day a man calls his doctor and says, "Doc, you've got to help me. I'm constipated and I don't know what to do about it." The doctor instructs the man to take a dose of milk of magnesia and says that he will call the patient back in about three hours to check on how he is doing. The doctor also reminds the patient to take his regular medications, including his Valium. Three hours later the doctor calls back and asks how the man is doing. The man says, "Well, I'm still constipated, but I'm feeling really good about it."