4. You feel as relaxed as you would on your own. Chemistry is about the elevated emotions and spark you feel, but also about the mellowing emotions and feeling as relaxed around someone as you would alone.

What does chemistry feel like in a kiss?

You can thank the many nerve endings in your lips for their part in making kissing feel so very good. Your lips have more nerve endings than any other part of your body. Along with the oxytocin and dopamine that make you feel affection and euphoria, kissing releases serotonin — another feel-good chemical.