Did you know that in Middle Eastern countries, kissing was not seen as a sexual expression and was only considered proper between two women, two men, or parents kissing their children - until recently? And that two men kissing on the lips in Eastern European countries was as normal as a handshake until Western influences took over? The jury's still out among scientists as to whether or not kissing is an instinct or a learned behavior; some think it comes from mothers premasticating food for their little ones and others think it may be related to grooming behavior seen also… more