Chances are that you live in one of the 90% of human cultures that practices kissing, but have you ever actually thought about the history of kissing, why we kiss or what happens to our brains and bodies when we do it? Well then, sit back and enjoy this fascinating video detailing all kinds of fascinating facts about lip locking.

For example, did you know that when you kiss your blood vessels expand, your  cheeks flush, your pupils dialate and your heart pumps more oxygen to the brain? Or that kissing releases seratonin, dopamine and adrenaline into our brains, which is why we feel so great when we kiss? Of course, that doesn’t mean you should go around kissing people all the time. Kissing does involve the exchange of between 10 million and 1 billion bacteria between you and your partner, which is why you should only kiss those with bacteria you trust.

 

There was plenty of great advice—and a lot of catharsis, it seemed—and we’ve collected some of the best tips for you here: 34 Tips for Your Younger Self

 

Featured photo credit: the kiss via Shutterstock

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