Sea otters hold hands while sleeping so they don’t drift away from each other.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
When dragonflies mate, their tails form a love heart.
22
When cats are happy, they may squeeze their eyes shut.
10
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Dolphins have names for one another.
18