Very.
Don't worry, this was 100% correct:
artificial birth control would give humans the impression that secular humans controlled the origin of life. They called it a slippery slope, and I agree. Unrestricted abortion was the next stop down that slide, and the final stop will be (is?) euthanasia.
One more thing. Martin Luther called birth control "marital sodomy." In other words, what makes one form of non-procreative sex any better or worse than any other?
There are commentators that have made the point that those practicing "marital sodomy" have no moral standing to condemn any other form of sodomy, and that this is ultimately the reason that some Christian efforts against same sex marriage have fallen flat.
I read something similar on another article today...something like “5 answers opposing same sex marriage.”
When there was the admission on the intentional act to prevent pregnancy, the author suggested that gave an inroad to same-sex marriage advocates to argue that marriage isn’t about procreation.
While I agree with the point that it did give an opening in the debate, I don’t believe it is a persuasive opening in that male/female sexual relationships are always potentially procreative while same-sex relationships never have that potential.