Sex is an important way to ensure group stability and ease tensions. Bonobos substitute sex for aggression, and sexual interactions occur more often among bonobos than among other primates. The female genitalia is on the outside. They use heterosexual and homosexual activities to release excitement and tension. Any erotic behavior employed by man is also used by bonobos.
Man is the closest living relative to both the bonobo and the chimpanzee.
In other words, the bonobo and the chimp are closer to humans than they are to gorillas. Chimps are known for making war. Physically, bonobos are smaller, darker, hairier around the face, and more erect than chimps. Without going into a lot of detail defining intelligence in ape terms, suffice it to say that bonobos are very intelligent. Observe their tool use and their ability to organize intricate social relationships.