Johnny whispers into his dad’s ear, “Will you give me ten dollars if I tell you what the man in the uniform says to mom every morning?”
The father takes ten dollars out of his wallet and  eagerly asks Johnny, “So what does the man in the uniform say to your mom every morning?”
Johnny replies, “He says, ‘Good morning, Mrs. Johnson.'” The father chuckles and shakes his head, realizing he’s been tricked by his clever son.