Sometimes the gags just write themselves. D'wife got me a card:
Wife: Asks again, louder.
Me, trying to remember which button makes the hearing aid louder: What?
Wife, now about ready to hit me: Asks again, very loud. Yes, I did find the right button.
Me: No cane, bangs knuckles on table slowly, "Knock, knock,..., " How many if I agree?"