Well, you certainly have an impressive stomach. I’m full after three sausages (~600 Calories), and you’re here eating at least three times as much.
I didn't get this way overnight, it took nearly a year of eating zero carb to really get into the one meal a day routine.
If you don’t eat enough Calories, you simply don’t have the energy to be functional. There’s no way around that.
Sure, but that is what hunger is for, the body does a pretty good biofeedback job when we let it. its number one function is homeostasis after all.