Sheer, an adjective used to describe hosiery, lip gloss, and sexy things to do, is now being applied to new delicate fragrances. "It's a reflection of how we're living these days, which is more simply," says Rochelle Bloom, president of the Fragrance Foundation in New York City. "Rich floral scents were the rage when lifestyles were over the top. Now the world is less opulent and so are the fragrances." Keep it light with these expert tricks.