It is very true, we are what we eat. I have always had a tendency to get fat. I cook with natural condiments that I grow and harvest myself but I still gain weight by eating my own food. I like to cook with seasoning and I like to eat. I also drink too much water throughout the day. And my colon and bladder respond very well to this whole process.
If you eat little, you don't get fat, if you drink little you don't urinate too much either. If you are healthy eating little it is very good.
It is not true that those who eat little won't gain weight. It all depends on how fast your body can get rid of it. If you poop three times a day, like all the men I know, there's no time to gain, weight.
If everything you eat taste 👎 you stop eating. It's what children do but we force them to eat with the result many can no longer stop if they had enough. Stress eating increases too but chemicals and medication are good for gaining weight as well. 🙃