My missus is "naturally thin". These people have us completely fooled. They give you the illusion that they can eat anything and never gain weight. After years of observation, this is false. "Naturally thin" people generally do not have faster metabolisms than us fat folk. In my observation we've been fooled in two ways.

1) They hit the buffet with us and eat as much or even more as we do. However, after the buffet, they often do not eat for the rest of the day, maybe longer.

After years of her proclaiming that she could eat "anything" and never gain weight, I finally gathered enough evidence to prove that she could indeed eat anything, but one big meal could sustain her for a day or more, where I would have to eat again after the large meal. She conceded.

2) Their hunger mechanisms are different, weaker or non-existent.

Witness yesterday, missus had not eaten all day. Was she hungry? Nope, but around 2pm she said "woah, I'm lightheaded, I should probably eat something". And proceeded to eat enough (garbage) to make her lightheadedness disappear. For me, and other normal folks, lightheadedness comes LONG after hunger. I only get lightheaded when I'm on low calories and have fought through many bouts of perceived hunger.

Unfortunately, I see folks around here and encounter folks IRL that think they can "learn" this 'naturally thin' behavior. It's not learnable, it's wiring. So the trick here is learning to deal with hunger signals in a productive way. She possibly has a genetic advantage in that hunger does not hit her like it does us. Although in a feast or famine world, I'd be able to pack on some fat for leaner times.

So considering I can be fat or lean, my choice, who has the advantage now?