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AUDIO:Sheril Kirshenbaum talks to CBC's Quirks & Quarks about the science of kissing.
(Image courtesy of Hachette Book Group)

Who doesn't remember their first kiss? From our first moment in our mother's arms to the defining moment of our wedding to our final moment as we exit this world, a kiss is often the act that accompanies our most significant events in life.

But why do humans kiss? Is it a cultural artifact or in our genes? And why do some cultures avoid it, while others embrace it?

In her new book, The Science of Kissing, Sheril Kirshenbaum, a research scientist at the University of Texas at Austin, explores the neuroscience, anthropology, and biology of osculation — and even gives some practical tips for the perfect smooch. She shared some of the highlights with CBC's Quirks & Quarks.