One in five long-term love relationships began with one or both partners being involved with others.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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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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Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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Two in five people in the world marry their first love.
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Wearing red increases attraction.
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