When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Couples' personalities converge over time to make partners more and more similar.
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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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