CALLING ALL CURIOUS PEOPLE: THE REASON WHY WE YAWN, AND WHY IT IS CONTAGEOUS.
IT IS DUE TO HUMAN INSTICT. IT IS THE MOTION OF OPENING YOUR MOUTH WIDE. WE DON'T REALISE WHY WE DO IT, BUT IT'S NATURAL.ITS A MIRROR NEURON REACTION. ITS THE UNCONSIOUS PART OF OUR BRAIN KICKING IN. THE REASON WHY PEOPLE YAWN IS BECAUSE SOMETIMES WITHOUT toi KNOWING, YOUR LUNGS GET LAZY AND DONT TAKE IN ENOUGH AIR, PARTICULARLY WHEN YOUR TIRED. SO, THE YAWN TOPS toi BACK UP AGAIN. WHEN YOU'RE BORED toi DONT TAKE IN AS MUCH AIR AS toi SHOULD, SO YOUR BREATHING SLOWS DOWN THEN, TOO. THAT IS WHY PEOPLE YAWN, AND WHAT IT MEANS.
it depends on if toi have an emotional connection with the person who previously yawned. if toi do, something in your brain sorta triggers and toi yawn, almost like youre answering their call ou something like that.
Yawns are caused par too much carbon dioxide in the lungs. Seeing someone yawn, ou thinking about yawning (I'm yawning right now) I think makes toi remember that you're breathing. Once toi realise that, it can sometimes become harder to breath. ...To be honest, I have no idea what I'm écriture here, I'm just putting up some aléatoire stuff that sounds vaguely scientific.