Kissing is one of the most common ways to show another person affection. But for every 10 seconds of kissing, we transfer around 80 million bacteria! According to Business Insider, the majority of germs transferred are benign. Kissing feels good because our lips are packed with sensitive receptor cells. Along with fingertips, lips are thought to have the highest concentrations of receptor cells. The receptors shoot signals to your brain, and you release chemicals like dopamine.
