In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Historically, sweat has been an active ingredient in perfume and love potions.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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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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The left ear is more responsive to words of love and emotion whispered into it than the right.
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Couples' personalities converge over time to make partners more and more similar.
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One in five long-term love relationships began with one or both partners being involved with others.
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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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