A man wonders if having relations on the Sabbath is a sin because he is not sure if doing so is work or play, so he goes to a priest and asks for his opinion on this question.
After consulting the Bible, the priest says, "My son, after an exhaustive research, I am positive that sleeping together is work and is therefore not permitted on Sundays."
The man thinks: "What does a priest know about having relations?" So he goes to a minister who, after all, is a married man and experienced in this matter.
He queries the minister and receives the same reply. relations is work and therefore not for the Sabbath!
Not pleased with the reply, he seeks out a Rabbi, a man of thousands of years of tradition and knowledge.
The Rabbi ponders the question, then states, "My son, it is definitely play."
The man replies, "Rabbi, how can you be so sure when so many others tell me it's work?"
"Because, my son," said the Rabbi drily, "if having relations was work, my wife would have the maid do it."