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Great Apes kiss and cuddle to keep the peace, says study
Researchers found that friendly touch before feeding helped bonobos and chimpanzees share limited food more peacefully in 60 observed sessions.
On Wednesday, July 22, 2026, researchers reported in Proceedings of the Royal Society B that chimpanzees and bonobos use physical touch to ease social tension during food competition.
The research team, led by Durham University's Department of Psychology, observed 116 individuals across five groups during 60 cofeeding sessions, using limited food to replicate natural resource competition.
Scientists documented diverse gestures including embraces and hand-holding, with risky finger-in-mouth contact occurring frequently among male chimpanzees, particularly between gender-matched pairs reflecting core social alliances.
Apes engaging in more reassuring touch spent more time peacefully sharing food with others. Professor Zanna Clay said, "Physical closeness is a really powerful way of managing stress."
These behaviors extend back at least six million years, suggesting touch played a crucial role in human evolution, with researchers now planning to explore whether physical contact reduces stress hormones.