Why does my grandma keep yawning out loud?

sheikalana
My grandma is 82 and I've been spending lots of time with her lately. She's never been the most elegant sophisticated lady and has zero knowledge about etiquette. She yawns like 300 times a day and every time she yawns she does it out loud doesn't matter if she's at home or somewhere else. Is this a normal behavior?
Why does my grandma keep yawning out loud?
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