They say that scent is one of out most deeply ingrained senses because our memory for them tends to be much better than our memory of sights, sounds, tastes and textures. The sensitivity of the sense of smell varies from person to person, but a familiar smell will probably always evoke a strong reaction. Barney's has an exclusive Le Labo Olfactory Dictionary that is designed to help you refine your sense of smell and develop a greater appreciation for perfumes and other scented things. It includes 40 specific essences and testing strips, all packed in a professional looking case, that you can experiment with. By mixing and matching a few, you may even be able to come up with your own signature fragrance. Price: $490.