Editor’s Note: Jill Filipovic is a journalist based in New York and author of the book “OK Boomer, Let’s Talk: How My Generation Got Left Behind.” Follow her on Twitter. The opinions expressed in this ...

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

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 ...

It’s a rule most of us learn as children: Keep your hands to yourself. And yet it seems that scores of men can’t quite follow it, even — perhaps especially? — when the whole world is watching. The ...