There's more to yawning than meets the eye.
Research shows that yawning is contagious.
And so when you see the word yawn, or look at photos of people mid-yawn, or watch film
of actual yawns, you will begin to feel like yawning.
Also, the more you are affected by the images, the more empathic you are.
So if you feeling the need to yawn right now, then you tend to be good at reading other
peoples emotions, whereas if don't feel like yawning then you are more of an emotional
island.
And so if you want to gain a fun insight into your friends, just have them to watch this
video and see if they yawn.