This is a cool tip if you have trouble getting to sleep simply yawn, and stranch for about 5 minutes before going to bed. Its easy to yawn. You can make yourself yawn just by thinking about it. Which brings me to a entersting question… Why are yawns contagous?
I hear it is a signal that the group should change activity. That would explain why people yawn when they are bored.
Ah!
When I read the topic name I just started yawning! 
shows you are all the same, interconnected
if you yawn and someone doesn’t it means they aren’t in your stream
in fact, go into a public place, do something like yawn ,
or sneeze and see who says bless you
it shows they are your bros.
*or go around with lots of caffeine in you thinking about things intensely while moving, and see who almost runs into you or seems to sway into your stream of motion, they are thinking similar thoughts.
**haven’t thought much about this one not sure about it, maybe scratch your head in public and look to see who is scratching their head at the exact same time!