Your tax dollars at work: according to this news report [link broken and removed], the United States government has researched the matter and has scientifically determined that sex makes us happy. Profound grasp of the obvious, there!

What I found interesting, although not surprising, is that the study (of 16,000 people) found that more than a fifth (22%) had not had sex at all in the previous year. You know that intuitive sense you get, that a lot of the people you run into every day badly need to get laid? You were right all along!