There's this classic example of an outdoor ad that pops up in just about any textbook on the subject. A French company puts up a billboard of a model in her lingerie with text that reads, "Next Monday, I'll Take My Bra Off." On Monday, the billboard is replaced with the one sporting the same model topless. It goes on until she's naked (love Europe's lax laws, no?), and here we have a campaign by people who had read their textbooks. This is the last in the series of billboards (in Europe, where else) that show an undressing model, placed sequentially on the way to a lingerie store. The rest of the pictures are at Frederik Samuel's. Also check out Burma Shave for the same approach.