Sky so high

Why is the sky so high?

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Scroll down for answer and notes.

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You could even tell this about humans banging their heads, and that makes me think about the great African folktale about the women who raised the sky up high by banging the fufu with their pestles! This is also an example of a kind of "divine providence" joke, like in the Nasruddin stories about how we are so lucky that camels do not fly and that pumpkins do not grow on trees, etc.

So the birds won't bump their heads.