These threads are always fun, because they often say more about us commenters than the subject matter.

Personally, I find the article's supernatural stimulus theory compelling.

Sex takes a lot of time if you aren't being selfish about it. It's also boring, compared with other forms of entertainment and creative pursuits, pornographic or not.

I'm not sure this is all that new, either. Jokes about the declining frequency of sex after marriage have been around for longer than I have. Maybe we're just hitting that wall sooner as the entertainment that we fall asleep to becomes more compelling.