Yeah CICO is technically true but as a thin person myself people really do not adequately account for normal stress response. My body’s natural response to stress is anorexia (the symptom, not nervosa / the disorder). I don’t have better self control I just lose my appetite when I’m upset vs some people get hungrier. It’s not even necessarily a healthy response, if I got cancer or another serious illness I would really struggle to take in enough calories to fight it off properly. In fact old people with a lil chub survive serious hospitalization a lot more readily.