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
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Historically, sweat has been an active ingredient in perfume and love potions.
309
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
Wearing red increases attraction.
30
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104