Dinner etiquette can get a bit ridiculous when you are left handed.
I was at a nice restaurant many years ago (the same place where I got my original gazpacho recipe).
I moved my water glass to my left side because I drink with my left hand.
Each time I moved my water glass, the waiter moved it back until I specifically requested that he allow me to keep it on my left side.
It was an amusing dance which went on for several cycles before the waiter reluctantly agreed to leave my glass alone.
I was young and he probably though he was teaching me a lesson in etiquette.
I also eat with my fork in my left hand. I have also had folks try to tell me which hand to hold my fork with.