I Have Stupid Questions In My Head

That's an interesting question ;), but most of us eat not to die and to recover the vitamins, proteins, fat... If we lost our appetite, then we wouldn't enjoy eating more chocolate, don't you think? ;)

because being hungry is painful, and eating feels good.

That's a good question.

@Springs good idea :D

Exactly...it's a vicious cycle ;) lol

you could live at a buffet and then youd never get hungry again :)

If we didn't eat we'd not be hungry again, we'd starve straight to our graves.

Life is an exercise in futility, I guess!