From the original cancan girls to ZZ Top’s Eighties’ hit, “Legs,” great legs have always caused a stir. And for fall, designers are paying close attention to them once again. Gone are the bare gams of past seasons, covered in the most striking tights and stockings seen in quite some time. And they’re everywhere. Looks include playful graphic prints, cozy crochet, bold fishnets, vivid opaques, sexy lace and feminine polkadot designs.