Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Baby rabbits are called kittens.
6
Dolphins have names for one another.
18
A group of pugs is called a grumble.
10
A puppy is born blind, deaf, and toothless.
16
When dragonflies mate, their tails form a love heart.
22