Kissing is fun! Swapping spit does sound a little gross, but Bustle and Dr. Sarah E. Johns, Senior Lecturer of Evolutionary Anthropology in the School of Anthropology and Conservation at the University of Kent, explains that snogging with someone regularly can actually be good for your health!

Having someone that you can kiss helps you to develop intimate relationships, and kissing might very well be nature's way of seeing if you and your kissing partner have similar immune systems. If you want to have biological children at any point in your life, having a dissimilar immune system from your partner could potentially pass down a stronger immune system to your future children.

The act of kissing helps you and your partner feel closer to each other, and it releases oxytocin into your body which helps you to feel good and makes you feel more bonded to the person that you're kissing.

Whether you're kissing the same person every night or someone new, it is a great way to feel closer to someone and get to know them more. I don't know about you, but a bad kisser is definitely a dealbreaker for me!

(via Bustle)