A little old lady goes to the doctor and says, "Doctor, I have this problem with passing gas, but it doesn't really bother me too much..."

"It never smells and it's always silent. As a matter of fact I've passed gas at least 20 times since I've been here in your office. You didn't know because it doesn't smell and it's silent."

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

The next week the old lady goes back. "Doctor," she says, "I don't know what you gave me but now my passing gas... although it's still silent, it stinks terribly."

"Good," the doctor said, "now that we've cleared up your sinuses, we'll get to work on your hearing."