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
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
The average person will go on a date at least 100 times before they finally marry.
33
Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
737
Wearing red increases attraction.
30
Historically, sweat has been an active ingredient in perfume and love potions.
309