Men fall in love faster than women do.
32
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
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 medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Parents receive 1 out of every 5 Valentines.
20
Historically, sweat has been an active ingredient in perfume and love potions.
309