A woman goes to her doc complaining of excessive flatulence. She tells him
that this started a couple of months ago, it is very embarrassing but
fortunately there is no odour and the farts are silent. Doc examines her
and gives her a prescription, tells her to come back in two weeks.
When she sees him again, she's quite upset and tells him that her farts now
stink to high heaven, absolutely revolting, but at least they are still
silent.
Good, says the doc. Now that we've fixed your sense of smell, we can work
on your hearing!