> Some people can eat and eat and stay slim, even without much exercise In my experience people described this way typically do not eat as much. For example th

> Some people can eat and eat and stay slim, even without much exercise In my experience people described this way typically do not eat as much. For example they often drink much less calories or eat a lot on parties, but do not snack massively on typical day. In rare cases they have something weird with health or metabolism (parasites or severe health issue that as side effects results in severe weight loss).