Hmm, i don't think it's inborn... most babies have tasted poo at one time or another, chewing them deliciously like chocolates haha! You probably did it too!
I wonder if they think that the poo is bad, or is just that they feel uncomfortable lying too near a place with strong smell overloading their extremely sensitive smelling sense haha... also might be a territorial instinct by going far away to poo and pee, marking a wider area with their smell...
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