Men who kiss their wives in the morning live five years longer than those who don't.
1k
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
Historically, sweat has been an active ingredient in perfume and love potions.
309
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
88
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Couples' personalities converge over time to make partners more and more similar.
235
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130