Historically, sweat has been an active ingredient in perfume and love potions.
309
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
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
Couples' personalities converge over time to make partners more and more similar.
235
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
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
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103