Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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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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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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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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Kissing an infection-free partner is good for your teeth!
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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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