When Did Ancient Humans Start Kissing ?

Kissing feels completely natural to us today, but from a purely biological standpoint, pressing our lips together and exchanging saliva is actually quite bizarre. So, why did ancient humans start doing it in the first place? In this breakdown, we explore the surprising psychology and evolutionary biology behind why we kiss. We'll trace this deeply ingrained human behavior back to its ancient roots, looking at everything from the primal instinct of "sniffing" out a mate's genetic compatibility, to the immune-boosting benefits of sharing microbes, and even how primate grooming habits shaped our modern romantic behavior. It turns out, this everyday act of affection has a fascinating survival mechanism built right into it. If you love exploring the weird and wonderful science behind human behavior, hit subscribe for more deep dives into the psychology of why we do what we do. #WhyWeKiss #EvolutionaryBiology #HumanPsychology #ScienceOfLove #BehavioralScience