A love-lorn Catholic couple were agonizing over the question:  Is sex
work or play?  If sex were work, it would be forbidden on the Sabbath.

So the man went to the priest and posed his question.  After some
thought, the priest replied "My son, sex is work."  and ushered him out
of his office.

The man was not satisfied with the lack of proper explanation (after
all, the priest was celibate, what could he know about sex?). So he
went to see the bishop, who after hearing the question and the priest's
response, took a moment to reflect and then said, "I agree with the
priest."

As a last resort, the man went to see a rabbi with the same question:
Is sex work or play? The rabbi, a man not unschooled in the way of a
man with a woman, answered immediately "Sex must definitely be play;
for if it were work, my wife would have someone else do it for her".