Kissing’s Roots Trace back 21 Million Years,New Research Suggests
OXFORD,UK – A new study indicates the act of kissing isn’t exclusively human,with evidence suggesting the behavior originated as far back as 21 million years ago in the common ancestors of great apes.Researchers believe the practice likely evolved from grooming behaviors or as a way to assess a potential partner’s health, challenging the notion of kissing as solely a romantic gesture.
The findings stem from observations of kissing and kissing-like behaviors in primates – specifically chimpanzees and bonobos,both known to engage in kissing to strengthen social bonds – and ancient hominids. The similarities in behavior between humans,chimpanzees,and bonobos led researchers to conclude their shared ancestor likely exhibited the practice. Further supporting this, a DNA study revealed modern humans and Neanderthals shared the same oral bacteria, suggesting regular saliva exchange through kissing over extended periods.
Beyond primates, scientists have documented similar behaviors in a diverse range of animal species. These include wolves touching mouths as a display of intimacy, prairie dogs using mouth-to-mouth contact for recognition, polar bears engaging in kissing with meaningful tongue movement, and albatrosses touching beaks during mating rituals.
“We need to understand that this habit is also shared by many other animals, so this behavior should be studied scientifically and not just considered something romantic,” stated Dr. Matilda Brindle, the lead researcher from Oxford University. While the study establishes a timeline for the emergence of kissing, the definitive reasons for its advancement remain under investigation.