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
40% of people who are rejected in romantic love slip into clinical depression.
72
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
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
Historically, sweat has been an active ingredient in perfume and love potions.
309
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
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