Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
278
Wearing red increases attraction.
30
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Couples' personalities converge over time to make partners more and more similar.
235
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
88
40% of people who are rejected in romantic love slip into clinical depression.
72
The left ear is more responsive to words of love and emotion whispered into it than the right.
44