ThinkGeek has come up with a nearness-based T-shirt that lights up when your Valentine is close by. So if your Valentine is missing then find him/her again with these hearts up shirts.

Quote "Suffering the aching emptiness and despair of being apart from your loved one? The 8-Bit Dynamic Life Shirt will register a meager two and a half pixelated hearts. But snuggle up to the object of your affection (who, incidentally, must be wearing a matching black and red T-shirt for this display of devotion to work), and all five hearts on both garments light up in a blaze of cheeky romance and bad style. "You complete me" MP3 not included."

Via - Gizmodiva