The single biggest predictor of love is proximity.
30
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
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234
When dragonflies mate, their tails form a love heart.
22
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.
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