Hmm, yeah. One could, of course, take the jaded point of view and say that these days, people need to be reminded... kind of a sad thought, really. Alternatively, if we don't need a special day for it, then Valentine's Day truly is just to torment us singles. If you want to take it a step further to Darwinism, maybe this is our own way of trying to pressure everyone into finding a partner. For the greater good. And stuff.
...This is the sort of post I make when I've been awake for close to 24 hours. I should really know better than to hit the "Submit Reply" button.