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
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Couples' personalities converge over time to make partners more and more similar.
235
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Raj from the Big Bang Theory is married to Miss India.
11