From the page: "A mother and her son were flying Southwest Airlines. The son (who had been looking out the window) turned to his mother and said, "If big dogs have baby dogs and big cats have baby cats, why don't big planes have baby planes? "
The mother (who couldn't think of an answer) told her son to ask the Flight attendant. So the boy walked down the aisle and asked the flight attendant, "If big dogs have baby dogs and big cats have baby cats, why don't big planes have baby planes?"
The attendant asked the young man, "Did your mother tell you to ask me?"? He said that she had. The flight attendant knelt down and whispered in the little boy's ear, "Tell your mother that it's because Southwest always pulls out on time.""