When the mood strikes, a kiss can catch us in a mix of tastes, textures, mysteries—and scents. We kiss nervously, flirtingly, angrily, or excitedly. And a kiss is not just all about sex: Hollywood celebs throw us air kisses, mobsters impart the kiss of death, and an astronaut kisses the soil after a safe return home. So why, then, are we so taken with the kiss?
Scientists agree our lips evolved first for eating—and then later for speech. Yet, with a kiss, a different kind of ‘hunger’ applies. Kisses set off a whirlwind of neuro-chemical messages yielding anything from sensations of touch to sexual arousal; feelings of closeness to even a wave of euphoria.
However, kissing is not a solo affair, and kissing transmits external messages as well. The bringing together of two bodies sets off messages just as powerful with your partner (whether they are precisely the same feelings is another matter altogether). Kisses pack quite a punch: even one can transmit much information about the potential of a relationship. Research proves that kisses are so powerful that a ‘first kiss’ gone badly can derail even the most promising of relationships.
(For more info; http://www.smarterlifestyles.com/2009/11/01/why-a-kiss-is-definitel...)