Okay, maybe not so sappy, but the headline intrigued you, didn't it? Anyway, in honor of the big day, some interesting links to inform and amuse you. Did you know over 1 billion cards are sent in the U.S. alone? And parents receive one in five of the cards sent each year. Check out this page for more factoids. Why February 14? Well, it turns out there is more than one theory about that.