If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
Historically, sweat has been an active ingredient in perfume and love potions.
309
Wearing red increases attraction.
30
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4