Monroe and his wife Martha went to the State Fair every year. Every year Monroe would say, "Martha, I'd like to ride in that airplane." And every year Martha would say, "I know, Monroe, but that airplane ride costs ten dollars, and ten dollars is ten dollars."
This one year Monroe and Martha went to the fair and Monroe said, "Martha, I'm 71 years old. If I don't ride that airplane this year I may never get another chance."
Martha replied, "Monroe, that airplane ride costs ten dollars, and ten dollars is ten dollars."
The pilot overheard them and said, "Folks, I'll make you a deal. I'll take you both up for a ride. If you can stay quiet for the entire ride and not say one word, I won't charge you, but if you say one word it's ten dollars."
Monroe and Martha agreed and up they go. The pilot does all kinds of twists and turns, rolls and dives, but not a word is heard. He does all his tricks over again, but still not a word.
They land and the pilot turns to Monroe, "By golly, I did everything I could think of to get you to yell out, but you didn't."
Monroe replied, "Well, I was gonna say something when Martha fell out, but ten dollars is ten dollars."