Thanks for an interesting read. I wouldn't call the first two at all "innocent reactions!" Those are blatantly disrespectful and speak volumes about the person's complete lack of care and compassion. However, I take your point!
Regarding yawning though...I have never slept well for as long as I can remember. I am always tired (amazing how much stuff I can get done because I'm used to it!) and have often found myself yawning through even the most interesting stories, whether watching something engaging on TV or at a group event or sitting with someone who is relating a great story.
Some of us truly are sleep-deprived and struggling to get through the day!
Love your writing and this is an excellent article. Thank you for an insightful read.