And are you foolish enough to ignore what's actually happened in the U.S market? God of War 3 featured nudity and it sold over 1.1 million copies in the states. The self-regulation of the video game industry is a limitation for porm makers, not hack and slashers or RPG's.
I don't just ignore it, I don't follow it at all (cause I couldn't really care less), but I'm glad you're up on the statistics.
There's no game developer out there who doesn't at least have an eye on the rating system when they decide on the content of a game, for sales purposes. But if GOW3 had nice sales and featured nudity, I don't see why Skyrim shouldn't too.