FOR CASH-STRAPPED Spaniards, Desigual’s end-of-season sales give them the chance to shed their fashion inhibitions . . . by shedding their clothes. Yesterday, the flamboyant clothing brand from Spain opened their summer sale in Madrid with the nakedly daring “Come In Undressed and Go Out Dressed” campaign, where 100 people strip down to their undergarments to avail of free shopping. Undressing may be a ploy to ensure that those shoppers really have no money on them. Or have the most perfectly imperfect bodies to fit into those broken-sized end-of-season markdowns.