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
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
88
Couples' personalities converge over time to make partners more and more similar.
235
40% of people who are rejected in romantic love slip into clinical depression.
72
Wearing red increases attraction.
30
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
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
Historically, sweat has been an active ingredient in perfume and love potions.
309