Our closest ape relatives, chimpanzees and bonobos, use physical contact such as hugging and kissing to build trust and reassure each other before stressful events, according to a study by researchers at Durham University. This behavior, observed in contexts of impending conflict over food, suggests that such displays of affection may be an ancient mechanism for strengthening social bonds.
Chimpanzees, often perceived as aggressive, were observed engaging in intimate gestures, including placing fingers in one another's mouths. Professor Zanna Clay noted that prior to stressful situations, these apes exhibit increased proximity and physical reassurance through touching and hugging.
The findings indicate that these comforting behaviors may serve to de-escalate tensions and reinforce social harmony within ape communities. This form of non-violent conflict resolution highlights the complex social dynamics and emotional regulation present in these species. The study's insights into ape behavior offer a potential window into the evolutionary roots of trust and social cohesion in primates, including humans.