Duke University has amassed an archive of vintage TV commercials dating from the 1950s to the '80s as part of their John W. Hartman Center for Advertising & Marketing History. Produced mostly by New York agency Benton & Bowles for such clients as Procter & Gamble, Kraft and Schick, they're available for free at iTunes U. Our favorites are the Old Spice commercials, download a few and let the old-timey testosterone sink in.