Steely Dan's first hit single and to this day the song most associated with the duo (the tagline on ads for the reunion album Two Against Nature was "Back, Jack, to do it again"), "Do It Again" is remarkably odd material for a Top Ten radio hit. It's a six-minute shuffle based on a sleepy bossa nova rhythm tapped out with Latin percussion by expatriate British jazzman Victor Feldman, lacking any kind of bridge or middle eight. It features not one but two lengthy solos, the first on an electric sitar (by 1972, a hopelessly out of fashion instrument last heard on the pop charts on the Box Tops' "Cry Like a Baby" and B.J. Thomas' "Hooked On a Feeling") played by the overall-clad man mountain Denny Dias and the second on what the liner notes termed "an inexpensive, imported plastic organ" (actually a Yamaha YC-30, a cheap combo organ with a unique sort of built-in theremin feature called a portamento strip), which Donald Fagen abuses to create an odd, high-pitched wailing effect similar to the odd noises Joe Meek got on the Tornados' "Telstar" a decade before. Bracketing those solos is a trio of lengthy verses filled with the sort of quasi-mystical Americana that covered the first two albums by the Band, delivered in Fagen's snickering whine of a voice and concerning the seductive power of addiction. Not much about this description screams "smash hit!," but "Do It Again" quickly became both one of the defining soft rock tracks of the '70s and the perfect introduction for a band that would go on to even odder and more wondrous creations over the next eight years.