A man's beard grows fastest when he anticipates sex.
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Two in five people in the world marry their first love.
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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The average person will go on a date at least 100 times before they finally marry.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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