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
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
A man's beard grows fastest when he anticipates sex.
239
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Couples' personalities converge over time to make partners more and more similar.
235
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14