'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 medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
Two in five people in the world marry their first love.
270
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
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
Parents receive 1 out of every 5 Valentines.
20