3 meals a day have become the basic necessity for most. Our ancestors used to eat as much as they could because there's no guarantee that they will have enough food until the next hunt. So, the body will go into a state we call "hungry", which reminds us to eat.
However with such plentiful of food available (know it didn't came easily, at least for me, grateful for it, hope that more people is out of hunger), is the feeling of hunger just a placebo effect that we trained ourselves to feel?
I am able to reduce my daily meals to 2 by having a bulletproof coffee in the morning. There's urge to eat between meals but even if I skip them, I'm fine.
Since I have a desk job, I still have plentiful of energy left in the evening for gym time.
One point to argue is nutritions but even if one is eating a lot, there's no guarantee that much of that intake is nutritional.