Two unwed vegetarians were knowing each other in the biblical sense when a rabbi, a priest, and a butcher entered the bedroom. The vegetarians, who were at the time inextricably engaged in the tossed salad position, were taken aback, but not enough to call the whole thing off. As the woman belonged to his congregation, the rabbi spoke first. "This hanky panky is not kosher," he announced.
As the man was a member of his church, the priest saw fit to speak next. "As you children are not wedded in the eyes of the Lord, it is not right that you should be making this salad, but rather you should be dressing."
For his part the butcher remained silent, all eyes, lamenting the lost business, but reveling in the carnality.