It occurred to me recently, under conditions that I leave to your ample and likely sordid imagination (how dare you), that the very concept of "premature ejaculation" in human males is a strange one, at least from an evolutionary theoretical perspective.

Tomorrow, as you are almost certainly aware, is Valentine's Day. For some of us, this a particularly blissful time of year. For others it's one that calls for intense cynicism. But regardless of your stance on Valentine's Day, there's no way to avoid being bombarded with romantic imagery. So you might as well take this …