Hôn nhau là bản năng hay là thứ ta học được qua quan sát?

Ms. DEMIRJIAN: Well, there seem to be two school of thoughts amongst the anthropologists. There is the side that believes it is an instinctual, intuitive mechanism, and they trace it to things such as an evolution from suckling on the breast to mothers passing regurgitated food into a baby's mouth, which doesn't sound very appetizing, but if you think back then, there weren't food processors, and there wasn't Gerber, so they had to make do.

And then there's another theory that says cavemen literally went around smelling and tasting the saliva of a young cavewoman to see if she was healthy and thereby able to be a good partner to procreate. That's a school of intuitive thought, that it's an instinctual thing. But some anthropologists also argue that it was learned because there were cultures in the South Pacific and in Asia that didn't really begin kissing until the European explorers came along and passed on that lovely technique.