See No Evil, Hear No Evil, Smell No Evil

A little old lady goes to see her doctor and tells him, "Doctor I have this terrible problem with gas. I can't seem to stop farting. The farts never smell and are always silent but it's still a problem all the same. Believe it or not I've farted at least 20 times since I've been here in your office."

The doctor says, "I see, take these pills and come back to see me next week."

The next week the lady comes back. "Doctor," she says, "I don't know what the hell you gave me, but now my farts stink terribly!"

The doctor says, "Good! Now that we've cleared up your sinuses, let's work on your hearing."