Over 40 isn't over the hill! Sexiness is more about attitude than clothing, so wipe your mind of any age bias and think young. By "young" I don't mean wearing clothes that are bare and tight—I mean subtly sensuous styles that also elongate your figure. Deep vee or scoopneck tops and dresses extend the torso and draw the eye upward; dropped waists and untucked tops visually extend the waist downward. Bare arms also create an illusion of length (short sleeves interrupt the flow), as do vertical details (front plackets, stripes, seaming).