Smell the lunch
The Slice Blog has a theory.
If someone who sits near you at work eats lunch at his or her desk and often dines on meals that give off powerful aromas, your reaction is apt to be shaped by your feelings about this colleague.
If you like the person, you will get a whiff of the strong-smelling midday repast and think "What zesty international cuisine is he/she savoring today?"
If you do not care for the person, your first thought is apt to be "Good God, what is that stench?"