Light a candle

A couple, desperate to conceive a child, went to their priest and asked him to pray for them. "I'm going on a sabbatical to Rome," he replied, "and while I'm there, I'll light a candle for you."

When the priest returned three years later, he went to the couple's house and found the wife pregnant, busily attending to two sets of twins. Elated, the priest asked her where her husband was so that he could congratulate him.

"He's gone to Rome, to blow that candle out" came the harried reply.