I'm left handed and while I was allowed to use it in school, my parents and teacher made me change the grip on my pencil. I used to use what I recently learned was a Quadrupod grip. I had very neat handwriting at that time.

Then when I changed it to the grip they said was correct I struggled with my handwriting and my wrist hurt very quickly when writing. I've recently decided to try and go back to my old grip and relearn the way I handwrite, because I want to do it more neatly and in a way that doesn't cause me pain.