A well balanced article on the thrills and spills of Aroma Marketing,
…Experts say fragrance is an effective sales tool because smell is the sense most directly connected to emotion and memory.
“You smell a rose, and your brain doesn’t go, R-O-S-E,” said Charles Zuker, a researcher with the Howard Hughes Medical Institute. “Your brain recalls what a rose is like.”
http://www.smh.com.au/news/business/retailers-get-on-the-nose–and-shoppers-like-it/2007/01/15/1168709678473.html?page=2