Great Apes use kissing and cuddling to reconcile after conflicts, study finds

A new study has found that great apes, including chimpanzees, bonobos, gorillas, and orangutans, use kissing and cuddling as a way to reconcile after conflicts and maintain social harmony. The research, led by scientists at the University of Cambridge, analyzed decades of observational data from wild and captive ape populations.

The study shows that these affectionate behaviors are not just random acts but serve a crucial social function. After a fight or disagreement, apes that engaged in kissing or embracing were more likely to resume cooperative activities like grooming or sharing food. This suggests that physical contact helps reduce tension and rebuild trust within groups.

Why this matters is that it provides insight into the evolutionary origins of human reconciliation behaviors. Humans also use physical affection to mend relationships, and this study indicates that such tendencies may have deep roots in our primate ancestors. Understanding these mechanisms can shed light on the social dynamics of both apes and humans.

The researchers examined over 1,000 instances of post-conflict interactions across 12 different ape groups. They found that reconciliation rates were significantly higher when apes used physical contact compared to other gestures like vocalizations or proximity. The study was published in the journal 'Philosophical Transactions of the Royal Society B'.

Background research has long shown that apes live in complex social groups where conflicts are common. Previous studies have documented that bonobos are particularly known for using sexual behavior to reduce tension, but this new work highlights that kissing and cuddling are widespread across all great ape species.

The next steps for the research team include investigating whether these behaviors are learned or innate, and how they vary between different ape species and social structures. This could help conservationists better understand the social needs of apes in captivity and in the wild, potentially improving welfare practices.