Sea otters hold hands while sleeping so they don’t drift away from each other.
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When dragonflies mate, their tails form a love heart.
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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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Wearing red increases attraction.
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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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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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