The Evolutionary Roots of Kissing Trace Back 20 Million Years
Kissing, a behavior seemingly ingrained in human connection, didn’t originate with romance. A recent study suggests the first kiss occurred not between lovers, but between our genetic ancestors approximately 20 million years ago.
Researchers from the University of Oxford and the Florida Institute of Technology investigated the origins of kissing, a practice that presents an evolutionary puzzle. While offering no clear survival advantage – and even posing a risk of disease transmission – kissing persists across species.
The study revealed that humans aren’t alone in this behavior. Chimpanzees, gorillas, orangutans, and pygmy chimpanzees all engage in kissing, indicating a shared ancestral origin. This widespread practice strongly suggests that kissing was inherited from a common ancestor, predating the growth of romantic love as we know it.
The findings were published on Wednesday in the journal Evolution and Human Behavior.
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