Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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The single biggest predictor of love is proximity.
30
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
One in five long-term love relationships began with one or both partners being involved with others.
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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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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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Two in five people in the world marry their first love.
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