Smell May Affect Portion Control
A food's smell may affect portion control, but not in the way you might expect. Researchers who gave men and women vanilla custard with varying aroma intensities learned that people take smaller bites of food when it has a strong scent. Plus, they continue to take smaller bites, even if the scent has diminished. The study authors say people may naturally regulate their sensations with their bite size, so a large bite might make up for a lack of aroma.
Source: Flavour, March 20, 2012