A Recent Study by Anthropologists have Concluded that Passionate Kissing is not a Human Universal
That's a pretty good article, but not all that surprising. There are very few human universals. Our culture goes a long way to affect not only how we interpret the world around us, but also how we interact with each other. If in some parts of the world something as simple as touching someone on the top of the head or touching someone with your feet is considered extremely rude, I can see how kissing can be viewed differently as well.