When I was a young boy I eat food like there was no tomorrow. I could plow through a Big Mac, large fry, large shake and a apple pie before any one else in my family was finished with their first bite. When I joined the USMC I learned to eat faster because we were conditioned to be in combat situations. When I was done with all my youthful experiences, I settled down to a life of mellow living but forgetting that my eating habits were not made for sedentary life.
My weight doubled over the years and it wasn't until my Buddhist training which brought me to mindfulness of all my thoughts, actions and words. I had to re-learn how to eat, forgetting the impulsive shoveling of food in a hurry to get done. It took many years but eventually I learned to savor my food and to take my time. Eventually I lost all the weight but the battle was a very long and difficult road.
Free will is an illusion. People always choose the perceived path of greatest pleasure.