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
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
16
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Wearing red increases attraction.
30
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
The left ear is more responsive to words of love and emotion whispered into it than the right.
44