Both male and female primates unconsciously seek out these friendships that provide benefits. The benefits can be protection, better access to resources, or securing the survival of their offspring.

Some of the complex penises found in multi-male to multi-female mating primates such as chimpanzees (h), brown lemurs (a) or macaques (d, e, f). Alan F. Dixson, Primate Sexuality ...

Some of the complex penises found in multi-male to multi-female mating primates such as chimpanzees (h), brown lemurs (a) or macaques (d, e, f). Alan F. Dixson, Primate Sexuality. The human penis is ...

Although male parental care is rare among mammals1, adult males of many cercopithecine primate species provide care for infants and juveniles. This care is often in the form of grooming, carrying ...

The study found support for this second hypothesis, namely that male masturbation co-evolved within multi-male mating systems where competition between males is high.

Most theories about the animal kingdom predict that taking multiple mates would be risky for a female without adding benefits. However, new research finds that in gray mouse lemurs, healthy ...

In other primates, when two groups meet it usually results in conflict, but in a multi-level society, these groups tend to tolerate each other. While there is evidence of multi-level societies in a ...

Some of the complex penises found in multi-male to multi-female mating primates such as chimpanzees (h), brown lemurs (a) or macaques (d, e, f). Alan F. Dixson, Primate Sexuality. The human penis is ...

Indeed, the study showed male masturbation has co-evolved with multi-male mating systems where competition is high. The ‘pathogen avoidance hypothesis’ also suggests male masturbation protects ...

Some of the complex penises found in multi-male to multi-female mating primates such as chimpanzees (h), brown lemurs (a) or macaques (d, e, f). Alan F. Dixson, Primate Sexuality.