How come yawns are contagious?!


Question:

How come yawns are contagious?

i was watching a commercial that everybody was yawning then i yawned. i asked my mom why yawns are contagious then she yawned then my dad yawned then my brother yawned then back to me.


Answers:

To break the cycle, you have to stick out your tongue when the other person is yawning.




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