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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The average person will go on a date at least 100 times before they finally marry.
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Historically, sweat has been an active ingredient in perfume and love potions.
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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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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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