I spent hours in front of a mirror a decade ago until I was able to move my left ear. Lots of trying to move things that either did nothing or made me clench my jaw or close my eyes, before eventually "feeling" my ear, and then a whole lot more of that before seing it move. It was exhausting, and even though I have a faint consciousness of the corresponding muscles in my right ear --- I have no desire to spend that time and energy again.
It makes sense for actors to do that type of thing, or maybe martial artists seeking to discipline every part of their body, but the time needed is too high for what's mostly a party trick for regular people.
Then again, maybe it gets easier with other muscles as you practice and master more things - could it help overall coordination, maybe improve typing speed or balance?
