Is it still considered rude to yawn without covering your mouth? Why? It's an involuntary response & not an indicator of boredom? I don't get it?

https://www.bps.org.uk/research-digest/stigmatisation-yawning-could-be-strategy-avoid-disease-study-argues

Stigmatizing yawning is disease prevention say scientists since it's disapproved of across human cultures & eras.

It was is & will be rude. Shut your trap! 🥱 🚫🛑
I don't know & IDC. Never noticed or covered my mouth. 👄
It's to prevent a mirror response in others silly! 🪞
I don't wanna see your gaping maw under any curcumstances! 🤢
It's for communal hygiene like a cough or sneeze 😷
Here's my take...
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Is it still considered rude to yawn without covering your mouth? Why? It's an involuntary response & not an indicator of boredom? I don't get it?
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