Couples' personalities converge over time to make partners more and more similar.
235
Speed dating was invented by a Rabbi in 1999.
45
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
One in five long-term love relationships began with one or both partners being involved with others.
177
Historically, sweat has been an active ingredient in perfume and love potions.
309
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
28
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4