Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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The left ear is more responsive to words of love and emotion whispered into it than the right.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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You burn 26 calories in a one minute kiss.
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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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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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