: The act can increase heart rate, dilating blood vessels and potentially lowering blood pressure.
Kissing on the mouth is a multifaceted human behavior that serves as a powerful tool for biological bonding , a litmus test for romantic compatibility , and a varied cultural symbol . While it feels natural to many, it is not a universal human practice, with research suggesting only about 46% of cultures engage in romantic lip-to-lip kissing. Evolutionary Origins Kissing on the Mouth
: The earliest recorded textual references to kissing appear in Mesopotamia and Egypt dating back to at least 2500 B.C.E. : The act can increase heart rate, dilating
Kissing has meant different things to different people throughout history. a litmus test for romantic compatibility