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
Speed dating was invented by a Rabbi in 1999.
45
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
'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
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
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