When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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A man's beard grows fastest when he anticipates sex.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41
As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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Couples' personalities converge over time to make partners more and more similar.
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