I have had many friends over the years who I have spent a weekend with or even lived with that have been astonished that I eat less than them. I guess that they always assumed that when I wasn't with them, I was secretly stuffing myself with goodies. It always mystified me as well. I knew I wasn't consuming an abnormally high amount of food but yet my weight stayed high. Don't get me wrong, I am not trying to say I didn't eat bad food and lots of it. I did, but I always knew that I was not eating the thousands of extra calories most my friends would need to maintain my weight. I also have always been lazy/inactive but I had many friends who were the same and liked to sit around and hang out instead of engaging in physical activity!
The point is that many people feel like extreme & excessive consumption is the only way people end up as morbidly obese. They also tend to think that when we say 'we don't really eat that much' we are covering up our guilt for having out of control eating habits. That is the case sometimes but not always and it does make those who aren't excessive binge eaters feel like they are being misjudged. I am one of those people. I know that my habits were on the high side of the normal range but unfortunately, my genetics & lifestyle choices did not allow me to be at healthy weight with that consumption level. I now know that only an extreme adjustment to my digestive system (surgery) will allow me to be at a healthy weight with a permanently restricted consumption & lifestyle change. Others will continue to be able to consume twice as much as me and be less active while maintaining a healthy weight, that is just how it goes!
Nic