Interesting post and link! The MRI results seem to support what I will refer to as the "school cafeteria time-travel effect." In the phenomenology of olfaction, anecdotal evidence gathered by yours truly suggests that among baby-boomers there is a near-universal smell recognition event that triggers a subjective sense of being sucked back through time to one's elementary school cafeteria. An important feature of the experience--as in most smell-recognition perceptions--is that the recognition and interpretation is instant and unequivocal. Frankly, I question the B.O./cheddar confusion. But perhaps there is a certain cafeteria gestalt that even a complex smell like cheese cannot approach. . .Thoughts, anyone?[/list]