Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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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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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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The single biggest predictor of love is proximity.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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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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