[Eli5] How did ancient (like very ancient) humans know they have to eat? Is it “programmed” into us from birth?
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…what?
Do you not know what hunger is?
Humans are very good at pattern recognition. When you get hungry you feel bad. When you eat you feel better. Pretty simple cause and effect to recognize
Babies learn an oral fixation almost immediately. Babies who don’t learn to scream when they’re hungry and suckle on literally everything for nourishment often died. Many Babies died from stuffing rocks and poisonous bugs in their mouths, but it was still better to instinctually want to eat everything than not to. Old babies (adults) learned from their mothers and personal experience to stop eating live stinging bugs. Learning is still a mystery.
It’s instinct.
You’re hungry, and you become grumpy and want something in your mouth.
It’s the same thing like being horny.
You want something to touch your dick or pussy.
Humans have very few real instinctual behaviors, suckling is one of them. Past that you have to remember that no one just flipped a switch and said “ok ape, you’re a human now” and that our behaviors are built up from generations of watching our parents and things around us. The thing that keeps me alive put food in my mouth and eating felt good. They learned it from whatever birthed them, and so forth going back to when we were little pre-human critters
Dawinism and evolution. Enough people died from something and we paired that scent with death, and this is genetically passed on.
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