text: I don;t know that the Church's position on heterosexuality is based on revelation rather than natural law.  In fact, those who believe that Jesus addressed the issue (in passing) when he spoke on divorce would have a reasonable claim that Jesus himself relied on natural law rather than on revealed truth.  "Male and female He made them" is a fact of life, not a revealed truth, and what follows from this is not something we need scripture to tell us, although it does help to recall the teleology imbedded in the philosophy of Wayne Fontana and the Mindbenders.