The Science of Kissing

Via Scienceblogs:

Given up to ten percent of humanity doesn't even touch lips, should we accept it's actually a cultural phenomenon? I'm not convinced. You see, kissing undoubtedly allows us to find out all sorts of information about our partner. We're exchanging pheromones. In fact, when we're engaged, our bodies release a cocktail of chemicals related to social bonding, stress level, motivation, and sexual stimulation. We become, in effect, 'under the influence.' It's powerful. The right kiss boosts feelings of euphoria stimulating pleasure centers in the brain leading me to suspect there's something to kissing that goes beyond social mores. While it may have evolved from primates feeding their babies mouth-to-mouth (I know, how terribly unromantic!), other scientists suggest it's crucial to the evolutionary process of mate selection.

I just thought the xray picture was cool.