I don't think the problem is as black and white and as you think. Some people can eat large amounts of food and not gain weight, even relative to their activit

I don't think the problem is as black and white and as you think. Some people can eat large amounts of food and not gain weight, even relative to their activity level. I do agree that those people won't be able to eat in the same quantity as people that generally struggle with weight and that their desire to eat seems to end quicker than some others. I think most people 'eat until not hungry.' For me, my default is 'eat until full' which I'm not sure is the same at all. I think it's primal programming to eat until full for many of us, because 10k years ago that might have meant surviving or not. I am usually in 'want to eat' mode. If I eat something, I might put that mode on pause for a few minutes, depending on how much, but I'll be there before the next meal. Then, I convince myself I'm going hungry, so the next meal I'll over eat. This cycle increases my stress level, which leads to more eating. I find that doing any physical activity outdoors reduces my desire to eat immensely. I don't mean a 5-15 minute walk, I mean being outside for a couple hours or more. My body seems to have two modes, eat mode and work mode. Sitting at a computer is what's causing my problems IMO. I have a low-stress job, but I think the very nature of a computer job creates some kind of primal-stress.