If you look around you, you will find your world filled with advertising--on huge billboards in the streets, on the pages of magazines, between the tracks played on the radio, on the walls of the subway, on the pages of internet sites, at the bottom of emails, on the backs of cinema tickets, on the shirts of football players. It seems that any surface that will hold still long enough to be read is considered a potential advertising medium. The fact that there is so much advertising out there means that it is part of our daily cultural experience--it's almost impossible to avoid it.