Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
104
One litter of kittens can be produced by more than one father.
57
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
A new born kangaroo is small enough to fit in a spoon!
7