Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
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Raj from the Big Bang Theory is married to Miss India.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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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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Two in five people in the world marry their first love.
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