Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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The single biggest predictor of love is proximity.
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Historically, sweat has been an active ingredient in perfume and love potions.
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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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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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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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