"But, dad," the boy said, "There's only one policeman!"

"Well, my son," his father replied, "Look, there are standing two policemen. If I regard the two policemen as four then I am drunk."

One day, a father and his little son were going home.

Now, he asked, "What's the meaning of the word 'Drunk', dad?"

At this age, the boy was interested in all kinds of things and was always asking questions.