Kissing is great! Everyone loves kissing. But when you stop and think about it, the idea of rubbing your face and tongue up against those of another human being is actually a little... weird. This video tries to get to the bottom of the science of kissing.

In truth, our love of kissing is a complex topic. Brace yourself for evolutionary biology, anthropology, neurotransmitters, our fundamental loves of breasts, and way, way more. I challenge you to not feel a deep and desperate desire to go kiss someone straightaway after watching it, though. [YouTube]