Historically, sweat has been an active ingredient in perfume and love potions.
309
Two in five people in the world marry their first love.
270
Parents receive 1 out of every 5 Valentines.
20
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13