A new study tracing the evolution of same-sex sexual behavior in mammals, using phylogenetic analyses, suggests these behaviors may have evolved in part to strengthen social bonding and relationships.
Evolutionary approach to animal behavior -- Diversity of behavior -- Genetics of behavior -- Development of behavior -- Nerve cells and behavior -- Organization of behavior -- Evolution of behavior: ...
Same-sex sexual behaviour may help monkeys and apes rise up the social ranks and ultimately have more offspring – and it seems to be especially beneficial in harsh environments where there are lots of ...