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Chimpanzee posture, gestures, and facial expressions communicate many messages and emotions between various individuals. When greeting a dominant individual following an absence or in response to an aggressive gesture, nervous subordinates may approach with submissive signals – crouching, presenting the hindquarters, holding a hand out – accompanied by pant-grunts or squeaks. In response, the dominant individual may make gestures of reassurance , such as touching, kissing, or embracing.