A mother and her son were flying Southwest Airlines from Kansas City to > Chicago.

The son (who had been looking out the window) turned to his >mother and asked, "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 >stewardess. So the boy asked the stewardess,

"If big dogs have baby dogs and big cats have baby cats, why don't big >planes have baby planes?"

The stewardess responded, "Did your mother tell you to ask me?"

The boy admitted that this was the >case.

"Well, then, tell your mother that there are no baby planes because Southwest always pulls out on time. Your mother can explain it to you."