Interesting article that suggests the context in which you smell the same scent is almost entirely determinant of your response to it:

Moreover, motivational responses were entirely different as a function of label. For example, when isovaleric + butyric acid was called “parmesan cheese” it inspired participants to say they would like to eat it, while when it was given the negative label (“vomit”) it provoked the wish to escape from it. The effect was so strong for certain odors, that participants could not believe that the same odorant had been presented to them at both sessions

https://web.archive.org/web/20090203043112/http://www.senseo...