Couples' personalities converge over time to make partners more and more similar.
235
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
40% of people who are rejected in romantic love slip into clinical depression.
72
In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
27
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
The average person will go on a date at least 100 times before they finally marry.
33
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44