Kissing may date back 21.5 million years in early ape ancestors Researchers studied modern primates to estimate how the behavior evolved Kissing is not universal today and only 46% of cultures ...

Ingrid Bergman is said to have uttered one of the most notable definitions of the act of touching lips: “A kiss is a lovely trick designed by nature to stop speech when words become superfluous.” Some ...

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 ...

A Babylonian clay model dated to 1800 B.C.E. shows a nude couple on a couch engaged in sex and kissing. The Trustees of the British Museum “My upper lip becomes moist, while my lower lip trembles! I ...