Hug Over a Distance: an intimate interface for remote couples by Florian Mueller. One friends said that is crazy, I think that is interesting.

You take the koala and rub its belly, which in turn sends out a hug signal, visualized by a little animation. Your partner is wearing a stylish vest, which nobody around her can identify as a piece of wearable computing. However, the vest contains a wireless receiver, which receives the hug signal. Inside the vest are small air compartments which inflate quickly all around her body torso, giving a sensation similar to a real hug. The hug is discretely received, because others cannot "see" the hug.

Don't forget to watch the video to see how it works. (via we make money not art)