Cats lick each other as a way of showing affection and forming social bonds. They also groom each other to remove dirt, parasites, and other debris from their fur. Cats also lick each other to assert dominance and show submission.
Cats lick each other (and their humans) to communicate, show affection, and, sometimes, out of survival instinct. This communal grooming behavior is called allogrooming, and here's why your cat does (or doesn't!) allogroom their furry housemates.
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