Lack of sleep and stress are associated with overeating, and not only that, they also trigger hormons that promote the body to prioritize building up fat reserv

Lack of sleep and stress are associated with overeating, and not only that, they also trigger hormons that promote the body to prioritize building up fat reserves. I'm on mobile and don't have time to link, but a quick google search should give medical studies on this. The "energy" thing is a simplification, but as a description of how this feels, it is apt in my view. This is not about thermodynamics.