Kissing may feel like a very human habit, but new research suggests it has much deeper roots. A team of scientists says the behavior likely began more than 20 million years ago, long before modern humans existed.
Edit: the actual study appears to be about cultures and not individuals, i. e. “The romantic–sexual kiss was present in a minority of cultures sampled (46%).”
Some of us don’t need the practice.
Edit: the actual study appears to be about cultures and not individuals, i. e. “The romantic–sexual kiss was present in a minority of cultures sampled (46%).”