Wearing red increases attraction.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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40% of people who are rejected in romantic love slip into clinical depression.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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