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
Some British police cars carry a teddy bear to console children after an accident.
46
When dragonflies mate, their tails form a love heart.
22
There was a cable network called The Puppy Channel that, for 3 years, broadcast only broadcast footage of puppies playing.
1