Have you ever noticed we tend to yawn when we see someone else yawn

It might sound like a myth but still.,

What makes you yawn when someone else yawns?

Ha ha... why?? well most answer would be about lack of oxygen to your brain that just like when someone tells you that he/she is hungry, even if you're not, you'll suddenly feel hungry by instinct...

If you don't believe me then try this little Experiment:-

Take a big yawn, cover your mouth out of courtesy, and watch and see how many people yawn. There's a good chance that you'll set off a chain reaction of yawns. Before you finish reading this question of the day, it's likely that you will yawn at least once...

Reason:-