A New York rabbi boards a plane bound for Jerusalem, where he's due to attend a large multifaith conference with other religious figures from around the world. On the way, the plane lands at Dublin in Ireland, where more passengers board. One of them is a Catholic priest, who is seated next to the rabbi.

Before long, they start discussing their beliefs. "Tell me," says the priest, "is it still a requirement of your religion that you do not eat pork?"

"It is indeed," the rabbi replies. "Even after all these thousands of years, my people do not eat pork."

"Ah, but did you ever get curious? Did you ever try just a little bit, just to see how it tastes?"

"Well," says the rabbi. "We are both men of God, so I'll be honest - yes. Once, when I was still studying at yeshivah, I sneaked out one night and went to a cafe, where I tasted pork."

The two men are silent for a little while, then the rabbi turns to the priest and says, "So tell me - is it still a requirement of your religion that you remain celibate?"

"It is, yes," says the priest.

"And did you ever get tempted? Did you ever become so curious you had to know what it's like?" the rabbi continues.

"Oh no - my faith in the Lord has always been unshakable," the priest says. "I have remained true to my vows, and have been celibate my entire life. But yes, I am also a human - so I have indeed wondered what it must be like."

"Well, it beats the hell out of a bacon sandwich," says the rabbi.