Kissing an infection-free partner is good for your teeth!
141
Men fall in love faster than women do.
32
You burn 26 calories in a one minute kiss.
605
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
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