A priest and a rabbi are on a plane together; the rabbi is reading a magazine and the priest is looking out the window. Finally, the priest asks the rabbi, "Is it still your custom to not eat pork?"

"Yes," the rabbi replies, "it is one of our faiths."

"Have you ever once broken your faith?"

"Yes," the rabbi admits, "Once I succumbed to temptation and tasted a ham sandwich."

The priest nods understandly and the two go back to what they were doing before. Until....

"Is it true," asks the rabbi, "that it is still one of your faiths to remain celibate?"

"Yes," answers the priest, "we still believe in that custom."

"Have you ever once broken your faith?"

"Yes, once I was weak and broke my faith."

The rabbi nods understandingly and asks, "Sure beats a ham sandwich, doesn't it?"