Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
The single biggest predictor of love is proximity.
30
Men who kiss their wives in the morning live five years longer than those who don't.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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