If you've wondered why couples kiss at midnight on New Year's Eve, the reason people love a New Year's kiss is pretty sweet.

A kiss on the lips doesn't always mean romantic love. Some kisses can be confusing, entangle emotions, or happen without a formal relationship. When someone kisses you on the lips without being in a ...

Kissing, for all popularity, is a bit of a mystery. Scientists have long debated when humans’ ancestors first put their lips together, and whether the act is simply a cultural trait. A new study ...