LIFE
TV on the Web: The science of smooching
Daniel Hurwitz, special for USA Today
May 1, 2013, 12:23 p.m. ET
Today's pick:Why Do We Kiss? on YouTube
The topic: "The average person will spend about 20,160 minutes of his or her life kissing." Michael Stevens at the educational YouTube channel VSauce investigates the scientific reasons why humans spend so much time smooching.
Why we're watching: A kiss is more than just locking lips. Stevens explains how kissing represents a biological taste test for your potential mate.
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