I agree, Widget. Smell is important to arousal for me. I love the way my husband smells...and tastes - I think the two senses are intertwined to some degree.

Smell seems to be a key to some of my memories also - every few years I get a whiff of an odor I can't describe and I'm 9 again, in my grandma's apartment in New York City (which I only visited twice) and the memory is sooo vivid. The rest of the time I can barely remember it.