Not for screwing/unscrewing but in France we have a satire mnemonic for remembering right and left:
The right hand is the one with the thumb pointing left.
Works only if you look at the back of your hands, and obviously not useful. We use it mainly to mock someone who mix right and left
TLDR: standing all day long can be worse than sitting, but alternating standing and sitting positions is very good for your health.
Standing desks have never been promoting standing all day imo, the title is pure clickbait. Standing desks are good for your health, just use them correctly.