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Cooked meat can have a crunchy burned exterior, which indicates wonderful tasty easily-digestible protein, great for our energy intensive brains.

Perhaps the crunchiness is related to a sense of safety? If you were being hunted, you'd hog down your food and wouldn't really get a chance to savor the sound it makes when you eat it.

(I'm completely riffing though)

Bones, and the marrow hiding within.