The typical person spends about 600 hours having sex between the ages of 20 and 70.
234
The single biggest predictor of love is proximity.
30
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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
Wearing red increases attraction.
30
Historically, sweat has been an active ingredient in perfume and love potions.
309
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14