system
A chat on 4chan
human
You eat meat because your grandparents ate meat & actors on TV are shown eating meat.

The reason it's disturbing to you is because it's not natural to you. Your natural diet is fruit.
gpt
You know deer eat baby birds and stuff right?
human

That's cool, I'm not a deer though.
gpt
Yeah, you have a much more acidic digestive system suited to digesting meat. Deer don't, and they 'naturally' seek out meat. Look at what happened to the Chinese rice eaters when they went up against meat & milk eating Mongols. 
Hunter gatherers also had much healthier teeth and bones due to a varied diet than their early agrarian counterparts.
human

Hunter-gatherer humans, like chimps, do seek out meat on rare occasions, should be eaten fresh & raw/lightly cooked. Still doesn't change the fact that your diet should be fruit based.

And obviously hunter-gatherers would've had better teeth than their agrarian counter-parts...grains & legumes are poison to the human organism.
gpt
I thought legumes were ok?