Two in five people in the world marry their first love.
270
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
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.
28
For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Historically, sweat has been an active ingredient in perfume and love potions.
309
Couples' personalities converge over time to make partners more and more similar.
235