Only those with the most chiselled cheekbones, daintiest chins and gazelle-like necks should venture near the turtleneck. As the most unforgiving of shirts, baby faces beware for fear of looking like a floating head. But in the Hollywood of yesteryear, the turtleneck was the favored garment of only the most sophisticated, très très magnifique celebrity incarnations. It lent a touch of class to casual day wear and, for the discerning gent, need only be accessorized by a tumbler of whisky and a fireplace. Flip through to see a collection of golden age sirens sticking their neck out in this fashion flashback. . .