Ever notice that all our sex hangups come from the old Jewish law, and the old Jewish law was built around the premise of maximizing the number of children, to keep the tribe strong, but making sure they were all legitimate, to avoid fights over inheritance, etc.? Now any sex act except "normal" intercourse, within married couples, without using contraception, is "immoral." Even though there are too many children being born for the planet to support.
But I suppose this is pretty extreme thread creep.