Professor Anthony Esolen writing today at Crisis Magazine Blog:
When the Church upholds the rules of chastity, she is not so much prescribing a diet, as she is identifying what is good for man’s sexual being, and what is not good. She is describing facts. You may say that these are not facts; you may not be a Roman Catholic. But we must be clear about what the Church is affirming. She says that to engage in sexual activity outside of marriage is bad for you, and by extension it is bad for the people around you, because no man is an island, and autonomy is a lie. There are things that chaste people can do and can enjoy that are spoiled or rendered impossible by the vice; and there are things that a society that expects chastity can enjoy that a society that expects vice cannot.
People who believe that the Church can change her teaching about these things do not see what is implied. They believe, it seems to me, that the teachings are arbitrary, “mere dogma” as they say. But we are arguing ultimately about facts. The Church is saying, “This here is laced with poison. It will riddle your bones. You will begin to cough and spit up blood. You might as well be bound and fettered. Here are the directives instead that will make you powerful. They work.”