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
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
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
A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
464
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14