This did NOT happen in my house...but so could have

A wife asks her husband, "Could you please go shopping for me 

and 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 6 cartons of milk?"

He replied, "They had avocados."

If you're a woman, I'm sure you're going back to read it again! 

Men will get it the first time.