James Robertford has an interesting twist on the 'six degrees of separation' concept. He has a section on his website called six degrees of smoking. He has basically got a bulk load of lighters with two lables on. One tells the owner to take a photo of them lighting-up with the said lighter and pass it on to a friend. The other sticker has an email address to send the photo to. Lots of people seem to pocket the lighter and never pass it on but there are plenty where the lighter has crossed continents.