Submitted by kenito225 t3_z6hxo6 in explainlikeimfive
Tsunnyjim t1_iy2qnci wrote
Hair is not circular in cross section, unless it's perfectly straight. Hair with oval or orregular cross section will be various forms of wavy, curly or tight curls.
As for why pubes are so curly, it's theoretically hygienic/ protection for the public region against certain things (but then promotes other things like crabs, so win some lose some on an evolutionary balance)
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