Does anybody know about the priest and the rabbi ?

Who find themselves on train together ? They get chatting and the priest asks if the rabbi, in his youth, had ever tried bacon. He shyly admits thet,yes, he once did. But, he asks, before getting his vocation, did the priest ever have ? The priest murmurs that yes, he once did. "Ah," says the rabbi, "better than bacon, isn't it ?"