![Gorillas at play. A new study shows young great apes like to engage in 'teasing behaviour' — especially against their elders. A small gorilla and a big gorilla face each other, their mouths wide open. The small gorilla has its hand on the big gorilla's head.](https://i0.wp.com/i.cbc.ca/1.7117806.1708121734!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_620/gorillas-playing.jpg?resize=620%2C349&ssl=1)
What do you call it when a chimpanzee offers his buddy a delicious piece of fruit, only to pull his hand away at the last second? It’s not quite play, argues anthropologist Erica Cartmill, but it’s not quite aggression either. It’s teasing.
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