Hostin: It's Naked Cowboy, 1; naked M&M, 0 - CNN.com
http://www.cnn.com/2008/CRIME/07/01/naked.cowboy/index.html?eref=rss_latest
"plausibly argues that consumers would believe that the M&M Cowboy characters were promoting a product rather than merely parodying The Naked Cowboy, and that viewers would believe that The Naked Cowboy had endorsed M&Ms"