During your normal activities two and a half pixelated hearts will light up on your shirt. Hey… you’re depressed and in need of a recharge. But get within hugging distance of your significant other wearing the matching shirt and suddenly the hearts on both of your shirts start to light up until you’re fully powered up. Go too far astray from the source of your affections and you’ll drop back down to two and a half hearts again. Got it?

http://tcritic.com/archives/cute-shirts-for-valentines/