40% of people who are rejected in romantic love slip into clinical depression.
72
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Couples' personalities converge over time to make partners more and more similar.
235