Cognitive controls of food intake link
“Although humans have the ability to make conscious, voluntary decisions and choices, many of our actions have a subconscious component that escapes voluntary control. This is why we eat palatable foods such as chocolate in the absence of metabolic need, even if we recognize the negative consequences of such actions."
From p 166 Handbook of Obesity Vol. 1, third edition, 2014 by Bray and Bouchard.
Hit link above for anatomical and CT evidence of this statement.