Your stomach shrinks and expands with how much food you’re eating. If you’re used to eating big meals 3x a day then ya you can eat more in one sitting than if you’re used to eating 2 properly portioned meals a day
Yeah fasting if I’m really observant about it…. Makes me hungry (really hungry) not boredom is maybe once a day, I can audibly hear my stomach growling for 10 minutes… Because of the expectation of food… Not because of the absence of food ;)
Another thing is when you start eating properly and have enough calories you notice that you could actually eat less to meet your needs 3 plates, becomes 2 plates becomes 1 plate with snacks which is essentially OMAD territory… The stomach actually becomes smaller and the process of widening it back up is somewhat painful, discomforting