We recently went to the Riot Grrrl exhibit at Yerba Buena Center for the Arts. In it, Miranda July posted to send a personal interaction, through others, to a designated person elsewhere. I don't know which came first -- The Giant Hug was published in 2005. A little pig sends a hug through the USPS to his grandma. The postal workers each hug each other along the way, and it involves a lot of links in the chain getting to grandma.