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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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Parents receive 1 out of every 5 Valentines.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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