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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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Speed dating was invented by a Rabbi in 1999.
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Couples' personalities converge over time to make partners more and more similar.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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Men who kiss their wives in the morning live five years longer than those who don't.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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