One from Ernie:
A mother and her small son were flying Southwest Airlines from Dallas to Houston. 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 that question?” The boy admitted that this was the case.
“Well, then, tell your mother that there are no baby planes at Southwest because Southwest always pulls out on time –now let your mother explain that to you.”