You hug your friend. You kiss your friend on the cheek. You plop a big, wet kiss on your friend's mouth. Wait, what was that last one? Kissing one's friends isn't as uncommon as you might think. Many ...

Kissing ignites a powerful biological response, releasing hormones like oxytocin and dopamine that foster connection and pleasure. Beyond romance, it reduces stress by lowering cortisol and can even ...