A little boy was curious about the world.
One day he goes to his father and asks: “Dad, if big dogs can have little dogs, how come big trains don’t have little trains?”
His father simply says: “Go ask your mother.”
The little boy goes to find his mother: “Mom, if big dogs can have little dogs, how come big trains don’t have little trains?”
She smiles and replies: “Why don’t you go down to the train station and ask the conductor?”
Off goes the little boy to the station. He sees the conductor in uniform and asks: “Excuse me, sir. Can you tell me why if big dogs can have little dogs, how come big trains don’t have little trains?”
The conductor looks down at him and sighs: “Son, here at City Rail our trains always pull out on time.”