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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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When dragonflies mate, their tails form a love heart.
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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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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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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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