In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Historically, sweat has been an active ingredient in perfume and love potions.
309
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Couples' personalities converge over time to make partners more and more similar.
235
The average person will go on a date at least 100 times before they finally marry.
33
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
Speed dating was invented by a Rabbi in 1999.
45
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14