Author: Sophia Yang

Why does homosexuality exist? Exploring the evolution of same-sex sexual behaviour in bonobos

Published by

Sophia Yang

on

October 25, 2026

in

syn·op·sis beta

The traditional narrative suggests that heterosexuality is the natural way of life in the animal kingdom, yet same-sex sexual behaviour (SSSB) has been documented in over 1500 different species (Gómez et al., 2023). One of these species is the bonobo (Pan paniscus), where SSSB frequently occurs (Waal et al., 1998). How and why then did…