"Show and Tell" joke
Little David was in his 5th grade class when the teacher asked the children what their fathers did for a living. All the typical answers came up - fireman, policeman, salesman, doctor, lawyer, etc.
David was being uncharacteristically quiet and so he teacher asked him about his father. "My father's an exotic dancer in a gay cabaret and takes off all his clothes in front of other men. Sometimes, if the offer's really good, he'll go out to the alley with some guy and do nasty things with him for money."
The teacher, obviously shaken by this statement, hurriedly set the other children to work on some exercises and took little David aside to ask him, "Is that really true about your father?" "No," said David, "He works for the Bush administration, but I was too embarrassed to say that in front of the other kids."
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