Even economists fall in love, and to mark the soppiest day of the year The Economist is busy doing what economists do best – data mining. They want to know whether there really is a relationship between sex and chocolate. The answer is mixed. Some countries love both. Others much prefer one or the other. The British are apparently far more keen on chocolate than sex, while Americans are lukewarm on both. It is perhaps not surprise that Brazilians don’t need chocolate to feel sexy. But oh, Japan, whatever is the matter?

Of course now we need to go further and dig into those US figures. What’s the betting that California is up with Switzerland while certain other states are hard up against the Y axis?