Is yawning actually "contagious"?
14 Jan 07
there are many theories of this in psychology at least. Here is my favourite. Yawning is a suvival mechanism, we instinctivly yawn when oxygen is scarse not just when we are tired. Therefore, if we see someone yawning we subconsciously feel threatened and yawn also. After a while it does indeed look as though it is contagious where, in reality, it is simply primeval instinct, a left over from a much earlier time. Good luck keep on posting