“…So far, among the 25 genera of Old World monkeys ( Cercopithecoidea ), apes, and humans ( Hominoidea ), there are eighteen genera where same‐sex mounting behavior has been observed, both in wild and captive groups (Poiani, ). Hindquarter presentation, ventro‐dorsal, and non‐copulatory mounting is a prominent form of same‐sex behavior in non‐human primates (Poiani, ), such as in Japanese macaques ( Macaca fuscata ; female–female mounts) (Vasey, Rains, VanderLaan, Duckworth, & Kovacovsky, ), rhesus macaques ( M. mulatta ) (Carpenter, ), stumptail macaques ( M. arctoides ; male–male mounts) (Chevalier‐Skolnikoff, ), bonnet macaques ( M. radiata ; female–female mounts) (Raney, Abernethy, & Rodman, ), hanuman langur ( Presbytis entellus ; female–female mounts) (Srivastava, Borries, & Sommer, ), and baboons ( Papio anubis ) (Owens, ). Pelvic thrusting and penile erections are commonly accompanied, however intromissions and ejaculations are unusual in male–male mounts (Sommer & Vasey, ).…”