It's been a while since I've posted anything on the sense of smell. I came across this video on Seed magazine's website, it's Chandler Burr (New York Times perfume critic) talking about "smell" within the context of design. If you've never read one of his Times' pieces, check one out. Perfume, like typography suffers from a lack of qualifiable way to describe it and thus requires referencing other things. Burr's use words to describe perfumes is spectacularly entertaining and at times quite cutting.
There are some great posts in the Foundation archives if you do a search for "perfume".