A grade school teacher was asking students what their parents did for a living.
Tim, you be first, she said. What does your father do all day?

Tim stood up and proudly said, He is a doctor.

That is wonderful. How about you, Sarah?

Sarah shyly stood up, scuffed her feet and said, My father is a mailman.

Thank you, Sarah, said the teacher. What about your father, Billy?

Billy proudly stood up and announced, My daddy plays the piano in a whore house.

The teacher was horrified and promptly changed the subject to geography. Later that day she went to Billys house and rang the bell. Billys father answered the door. The teacher repeated what his son had said and demanded an explanation.

Billys father said, Well, I am actually a lawyer. But can I explain a thing like that to a seven-year-old boy?