Something I've noticed with "naturally skinny" people: They simply don't have the appetite of the obese. They don't need to self-regulate their eating, as they just don't have the desire to eat. Their sense of hunger is properly calibrated. If they eat a large lunch, they won't even be hungry at dinner time and might just have a snack if they eat at all.
As an obese over-eater, I'm insanely jealous. I'm almost constantly hungry. For me to lose weight, I have to ignore the literal pain in my stomach and the strong biological urge to eat. I literally just finished my lunch 45 minutes ago which consisted of a roast beef sandwich (with like 8 oz of roast beef) and some chips. About 800 calories. I'm still hungry.
I'm not dehydrated and confusing thirst with hunger. My urine is almost completely clear.
> I suggested eating hamburgers and pizza, and he said that he couldn't stand the taste. His lack of weight had little to do with self-control.
Absolutely wild. Maybe that's the next level of human evolution: To have a brain that understands that food will always be readily available in modern civilization and so finding high-calorie foods delicious and providing a dopamine hit for consuming them isn't necessary.