There are gestures that seem small, but they say it all. When a man is in love, a gentle kiss on the neck can become one of the deepest expressions of affection and desire. It's not just a simple ...

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 ...

The first kiss in recorded history dates back nearly 5,000 years! The earliest recorded instance of kissing dates back to ancient Mesopotamia around 2500 BCE. Clay tablets from this era describe two ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. “The meeting of ...