Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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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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Men who kiss their wives in the morning live five years longer than those who don't.
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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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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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The single biggest predictor of love is proximity.
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Men fall in love faster than women do.
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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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