The sciency bit: Something to do with the action of yawning releasing endorphins. You see someone yawning and subcontiously think ooo I could do with some endorphins and yawn yourself. Now that I uderstand but why the hell does this make me yawn as well? :yawn1::yawn1::yawn1::yawn1::yawn1:
when my sister was younger she said that yawning was probably contagious because when someone else yawns they take loads of the oxygen from the air so you yawn back to try and catch up on it lol
I heard this too, i've heard that it is a natural instinct, an imbreed darwism, that although rationally we know there is no threat to the oxygen levles our natural instinct is to panic and look out for our own needs hence we yawn to make sure our survival-due to the 'limitation' of oxygen-is not compromised.
i've also heard that cats yawn becuase they are comfortable and happy. this meant i used to purposefully yawn into my cats face
