Overview
- Findings appear in Evolution and Human Behavior from a University of Oxford–led team with co-authors including Catherine Talbot.
- The study defined a kiss as non-aggressive mouth-to-mouth contact without food transfer and mapped reports across primates.
- Modeling places the behavior in the common ancestors of great apes, with observations in many Old World monkeys and most great apes, except eastern gorillas.
- The authors say Neanderthals likely kissed, citing earlier work on shared oral microbes and genetic exchange with modern humans.
- Kissing is documented in only 46% of human cultures, and the authors present the reconstruction as a provisional framework for future research.