I'll start:
So I didn't bother looking in to this "mewing" crap until recently because for a long time it was something mainly associated with incels and like hell I want to indulge those folk. Lately I've noticed it's now become more of an ironic meme where people just reference it more as a joke than anything (even corpos like Duolingo referenced it in a YouTube short) so I went "fuck it, might as well find out what the hell this shit is."
The second I found out "mewing" is "a practice believed to help reshape ones face by leaving the tongue against the roof of your mouth" I went "…what the fuck?! That's just how my mouth is by default when it's closed!" And it's been that way all my life as far as I know. So wait you're telling me most people don't have their tongue against the roof of their mouth when it's closed?
Oh and wanna know something kinda hilarious? I've been engaging in voice training to make my voice sound more feminine and guess what was recommended as a method to help train my mouth to better attain the resonance needed for a softer, feminine voice? Mewing.
For some reason this shit makes me fucking giddy and I can't explain why.