One day, a little old lady went to see the doctor.
The kindly medical professional asked her, “What seems to be the problem, dear?”
She said, “Doctor, I have this problem with gas, but it really doesn’t bother me too much.
“My farts never smell, and are always silent.
“As a matter of fact, I’ve farted at least 20 times since I’ve been here in your office. You didn’t know I was farting because they don’t smell and are silent.”
The doctor said, “I see. Take these pills and come back to see me next week.”
The next week, the little old lady returned for her follow-up appointment.
“Doctor,” she said, “I don’t know what you gave me, but now my farts, although still silent, stink terribly…”
The doctor said: “Good! Now that we’ve cleared up your sinuses, let’s work on your hearing.”