I saw a funny Valentine's Day card at FigMince's blog. He writes from Australia, hence the British spelling below:
Outside of the card: "Thank goodness it's Valentine's Day so I can tell you how much I secretly love you from afar and how desperately I lust after you and how obsessively I fantasise about us being together forever..."
Inside: "Every other day of the year my parole officer calls it stalking."
But for something more appropriate to this day, check this site: http://www.youtube.com/watch?v=Rooyt3ptNco&feature=email
Love you all,