YOU MAY HAVE TO READ THIS ONE TWICE BUT ITS FUNNY!
A wife asked her husband, "Could you please go shopping for me? Buy one carton of milk. And, if they have avocados, get 6."
A short time later the husband comes back with 6 cartons of milk. The wife asks him, "Why did you buy SIX cartons of milk?"
He replied, "Because they did have avocados."