Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Dolphins have names for one another.
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The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
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When dragonflies mate, their tails form a love heart.
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