What causes arthritis?

A man who smelled like a distillery flopped on a subway seatnext to a priest. The man's tie was stained, his face wasplastered with red lipstick, and a half-empty bottle of gin wassticking out of his torn coat pocket. He opened his newspaperand began reading. After a few minutes the disheveled guy turnedto the priest and asked, "Say, Father, what causes arthritis?""My son, it's caused by loose living, being with cheap, wickedwomen, too much alcohol, and a contempt for your fellow man.""Well, I'll be damned," the drunk muttered, returning to his paper.The priest, thinking about what he had said, nudged the man andapologized. "I'm very sorry, I didn't mean to come on so strong.How long have you had arthritis?""I don't have it, Father. I was just reading here that the Pope does."