There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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40% of people who are rejected in romantic love slip into clinical depression.
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Couples' personalities converge over time to make partners more and more similar.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
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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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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Historically, sweat has been an active ingredient in perfume and love potions.
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