“Is the pope catholic?” is a common sarcastic response to a question to which the answer is obvious. “Does the pope oppose homosexuality?” is a question with a similarly clear answer. So it comes as little surprise to people that the pope chose to use his Christmas address to the Vatican bureaucracy, one of the seminal speeches on the papal calendar, to denounce homosexuality and gay marriage. This opinion should shock no one; it certainly does not shock me. It does, however, illustrate a deep problem with the moral philosophy of the church and of religious moral philosophies more broadly.