НЕРВНАЯ УЛЫБКА ПРИ ОБЩЕНИИ — ВСЁ ПО ПРОТОПОПОВУ
A dog baring its teeth is showing aggression. It's displaying its weapons. Monkeys, when they show off their teeth, aren't necessarily doing the same. Primatologist Signe Preuschoft studied rhesus macaques, and noticed a great deal of teeth-baring in their social interactions. It did not signal the beginning of a fight. Most often, it happened during moments of tension between more dominant and less dominant members of a group. The less dominant monkey was the one that smiled, and often, after the smile, the aggressor became more friendly. The macaques weren't showing off weapons. They were making a sort of display of submission to the more dominant member. When danger threatened, they smiled. This behavior has come to be called fear grinning.