I have a friend who recoiled from kissing her young daughter on the lips. I was incredulous. Planting a smacker right on baby’s mouth is one of the visceral pleasures of having an infant. But here’s ...

Kissing feels instinctive and intimate, yet scientists now argue it is a surprisingly recent and uneven addition to human behavior. Instead of a single romantic origin story, the evidence points to a ...

Kissing is not universal among human beings and, even today, there are some cultures that have no place for it. This suggests that it is not innate or intuitive, as it so often seems to us. One ...