In the wild, bonobos can spend most of their day having sex since they can find all the food they need easily. Chimpanzees cannot do that because they have to spend a lot more time looking for food. Female bonobos can band together to control the males, using sex as a weapon, denying any male that misbehaves access to them sexually. Female chimpanzees cannot do that and they are often beaten by the male chimps.
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Have sex for pleasure.
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run