An old lady visits a doctor’s clinic.
Lady: I have a slight problem with gas, although it doesn’t bother me too much. Whenever I fart, it’s always silent and it never smells. And, to tell you the truth, I’ve farted at least 10 times since I have been here in your clinic. I am sure, you didn’t notice it because there is no smell or sound.
Doctor: I understand. I will give you some pills. Take one pill a day & come back to see me in 4 days.
After 4 days, the old lady comes back and complains to the doctor.
Lady: Doctor, I don’t know what on earth you gave me, but now it stinks terribly whenever I fart.
Doctor: Great! Now that we have cleared up your nose, let’s work on your hearing.