A group of pugs is called a grumble.
10
One litter of kittens can be produced by more than one father.
57
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When dragonflies mate, their tails form a love heart.
22