Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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The male seahorse carries babies and 'gives birth' to them instead of the female.
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When dragonflies mate, their tails form a love heart.
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A dork is a whale's penis.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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