Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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A man's beard grows fastest when he anticipates sex.
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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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