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
The average person will go on a date at least 100 times before they finally marry.
33
In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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Historically, sweat has been an active ingredient in perfume and love potions.
309
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
Men who kiss their wives in the morning live five years longer than those who don't.
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