I used to work a place where sometimes, the kids didn't have money for a soda, and I could tell they were thirsty.. I usually sell them one for their soul.. I don't think I kept the box of "certificate of ownership" slips we made, but for a while, I owned at least 20 souls (and probably, the same soul twice... hmm) :) Sometimes I meet them and they're all grown up, but many of them still remember that I own their soul :D