In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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40% of people who are rejected in romantic love slip into clinical depression.
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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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A man's beard grows fastest when he anticipates sex.
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