Same-sex sexual behavior seen in many primate species, suggesting evolutionary origin
NBC News • • science
Key Points:
- A comprehensive study published in Nature Ecology & Evolution found that 59 nonhuman primate species, including bonobos, chimpanzees, and macaques, engage in same-sex sexual behavior, with repeated occurrences observed in 23 species.
- Researchers suggest that same-sex behavior in primates evolved to facilitate social cohesion, reduce conflict, and build bonds within complex social groups, especially under environmental stress or strict social hierarchies.
- The study challenges traditional views of animal sexual behavior by highlighting its broader social functions beyond reproduction, describing same-sex behavior as a "currency" for managing social dynamics and competition.
- Data limitations and historical biases in research have led to underreporting of same-sex behaviors in primates, with many species yet
