A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
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
In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
27
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Men fall in love faster than women do.
32
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
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29