While others debate the chronology of "Last Tango in Paris," I have a similar question: Which came first: 1. A single, "(The) Mexican Shuffle"; 2. An album, South of the Border, which included that track; 3. Or a commission to Herb Alpert and Sol Lake by Clark's Chewing Gum, for a catchy track in its Teabury advertising campaign? This, I suggest, isn't merely trivial. If my memory serves, it was that television (and radio?) spot that kept a floundering TJB in the nation's ears, until "A Taste of Honey" exploded on the scene.