Dick would know the doctor was coming, and he'd have an almond daiquiri ready for him. The doctor would come in and have his almond daiquiri and go home.
One day Dick ran out of almonds, and he thought, "Well, the doctor won't know the difference."
So he cut up a hickory nut and made a daiquiri with it. When the doctor came by, Dick put the drink in front of him.
The doctor took a sip and said, "Is this an almond daiquiri, Dick?"
And Dick said, "No, it's a hickory daiquiri, Doc."