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I'll give another example of an instinct: grooming. The impulse to clean, organize, wash, scrape skin and hair.

Instincts play some role in grooming rituals but the exact expression is influenced by culture and personal choice.

Now consider that many insects groom themselves. Could there be some common element in all of the types of animal grooming and the impulse to self-groom (and to groom others?)

Think about THAT next time you toss a salt packet in the bathtub or braid your hair!