@kingsthings it means your brain needs oxygen
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@kingsthings One theory is that cavemen used yawns to communicate silently while hunting. One would yawn, the other would respond yawning.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@kingsthings that's still a mysteryThanks. Twitter will use this to make your timeline better. UndoUndo
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@kingsthings the more sympathetic you are the more likely you are to yawn when you see someone else yawn. -
@AngeliqueCara@kingsthings well done!
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@kingsthings because it spreads to more people...
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@kingsthings mirror neuronsThanks. Twitter will use this to make your timeline better. UndoUndo
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@kingsthings We're all tired.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@kingsthings yawns are contagious this is why, Everyone yawning is lacking oxygen to the brain. Everyone yawning is using yours. Perfect :)Thanks. Twitter will use this to make your timeline better. UndoUndo
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