A Jewish man lives into a Catholic neighbourhood. Every Friday The Catholics are driven crazy because, while they're morosely eating fish, the Jew is outside barbecuing steaks. So the Catholics work on the Jew to convert him to Catholicism.
Finally, after many threats and much pleading, the Catholics succeed. They take the Jew to a priest who sprinkles holy water on the Jew and says, "Born a Jew, Raised a Jew, Now a Catholic."
The Catholics are ecstatic. No more delicious, but maddening smells every Friday evening. But the next Friday evening, the scent of barbecue wafts through the neighbourhood.
The Catholics all rush to the Jew's house to remind him of his new diet. They see him standing over the cooking steak.
He is sprinkling water on the meat and saying, "Born a cow, Raised a cow, Now a fish."