Why are yawns contagious?

I always have thought contagious yawning was psychological, an example of the power of suggestion at work. "Hey, he's tired...hmm, I'm tired, too." Of course, you don't consciously think that. I think itches can be contagious in just the same way!

we spout spit during the yawns,and there are some bugs which are contagious in the spit,when the others breath the air in,they will be infected.that's not some neurological phenomenon but biological phenomenon.hope this helps Have a good day

Well, I have heard the thing about our brain needing Oxygen and I think this is a lot of the reason why why Yawn when we are tired for sure. Then the reason I think it is contagious is when we see someone out there yawning, it sends a message to our Brain that we need Oxygen, so we end up following that person and then end up usually feeling better as well.

hi mich i dont know either ... but .. after i started you can hear the corus from my hubby ... and when he starts the corus is from me cheers

I heard some sayings that 'yawning are contagious'. You can notice that in a sitting area, if one person yawns, it seems you will notice another person will yawn too. It is quite amazing how this happens. By the way, I read somewhere too, that when we yawns our eyes will automatically closed. Is it dangerous to yawn while driving? We yawn when our body needs oxygen. It's sort of our body's mechanism to satisfy that oxygen-hunger! Opening our mouth to grasp more air is the quickest way to supply that need and maintain homeostasis in our body. Cheers and happy myLotting!