eScienceCommons, Ella Davies writes in BBC Nature: “Female bonobos


species Pan paniscus are referred to as the ‘erotic’ or ‘promiscuous apes’ because they regularly engage in sexual contact with both their own and the opposite sex. “’[Sex] is used to reduce stress and competition, develop affiliations, express and test social relationships and for reconciling conflicts and consoling victims in distress,’ explained Dr Zanna Clay, from Emory University in Atlanta, who has been studying vocalisations in the species for five years.”Source: eScienceCommons