Wearing red increases attraction.
30
Couples' personalities converge over time to make partners more and more similar.
235
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
The single biggest predictor of love is proximity.
30
Men fall in love faster than women do.
32
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29