A priest and a rabbi were having lunch and the priest asked, "Have you ever strayed from not eating pork?" The rabbi said, "Well, once, but there was absolutely nothing else to eat, so I had a ham sandwich."
Then the rabbi asked the priest, "Did you ever stray from your vow of celibacy?" The priest said, "Yes, just once."
And the rabbi said, "Sure beats a ham sandwich, doesn't it?"