The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
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Dolphins have names for one another.
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Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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