Why people kiss
t.germeau / Flickr (CC BY 2.0)
This post from Natalie Engelbrecht, psychotherapist, naturopathic doctor, and researcher, originally appeared on Quora as an answer to the question, "Why do we kiss?"
The scientific study of kissing is called “philematology” (philos in ancient Greek = earthly love). During a kiss, couples exchange 9 mg of water, 0.7 mg of protein, 0.18 mg of organic compounds, 0.71 mg of fats, and 0.45 mg of sodium chloride, along with 10 million to 1 billion bacteria according to one estimate [1]. Читать дальше...