Since I'm in sync with everyone else in this, ie, it's easier for me to shut my mouth completely than to eat in moderation, I'm guessing there's some biological

Since I'm in sync with everyone else in this, ie, it's easier for me to shut my mouth completely than to eat in moderation, I'm guessing there's some biological drive behind this. Maybe that happens because we, as animals, have our bodies more adapted to eat as much as we can while food is available than to risk losing that opportunity for another unknown meal in the future. That to say that it is a hardwired behavior we have, a survival strategy that makes sense in the wild. Problem is we don't live in that environment anymore. So, I think fasting works because our bodies trigger another natural response, that of focusing our senses to the search of food, kind of accepting that food is not available. Thus, it's easier to simply not eat at all instead of trying to eat moderately. These are my 5 cents.