Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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Historically, sweat has been an active ingredient in perfume and love potions.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Speed dating was invented by a Rabbi in 1999.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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