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
When dragonflies mate, their tails form a love heart.
22
One litter of kittens can be produced by more than one father.
57
Dolphins have names for one another.
18
A group of pugs is called a grumble.
10