An old lady goes to the doctor. She mentions that no matter what when she farts, they are always silent and don’t smell. To illustrate her point, she lets one go.
Old lady: See, Doctor, it was silent, and I don’t smell anything.
Doctor: I see, I am going to give you a prescription, then I want you to come back in a week and see how you are progressing.
One week later, the old lady comes back.
Old lady: I don’t know what you gave me, doc, but now my farts smell horrible!
Doctor: Great! Now that we fixed your sinuses, we can work on your hearing.