Dolphins have names for one another.
18
When dragonflies mate, their tails form a love heart.
22
One litter of kittens can be produced by more than one father.
57
Baby rabbits are called kittens.
6
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When cats are happy, they may squeeze their eyes shut.
10
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11