Curvy, exotic and just a bit erotic--we're talking Art Nouveau here. This spring the catwalks reflected the works of such artists as Alphonse Mucha and Aubrey Beardsley-from the sinuous linear motifs right down to the nature references. (The ever popular dragonfly, for example, has found its way onto both beautifully bejeweled hats and footwear.) Equal parts decorative, sexy and graphic, this is an era that's ripe for the fashion ...