Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Couples' personalities converge over time to make partners more and more similar.
235
Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
737
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
The left ear is more responsive to words of love and emotion whispered into it than the right.
44
Wearing red increases attraction.
30