An elderly Jewish man was admitted to the local hospital, which happened to be run by a Catholic order. All the nurses were nuns.
One of the nurses was preparing his records and she asked him who would be responsible for his bill.
"I don't have any money," the old man told her.
"Do you have any family?"
"I have one sister who changed her religion and became a nun, so she's an old maid."
"I'll have you know that we're not old maids," the nurse protested. "We're married to Christ."
"In that case," the old man replied, "send the bill to my brother-in-law."