" Classic grooming behavior, Dr. Walid told me later, something our fellow primates indulge in to maintain troop cohesion. Dr. Walid said human beings use language for the same purpose—which is why you find yourself talking total bollocks to people you meet at a bus stop and then wonder what the fuck did I do that for? As "

― Ben Aaronovitch , Whispers Under Ground (Rivers of London, #3)