In the Netflix movie 1922 we see the father and the son eat dinner right after talking with the sheriff about the missing wife.
I noticed that they were holding knives in their right hands and forks on their left. Then the father finished cutting up a piece of steak maybe, before switching the fork to the right hand. I wouldn't have though much about it if the son didn't do the same.
Was it a common practice back in 1920s for people to keep switching knives and forks while eating?
After seeing the numerous comments posted to this question, I would like to point out one thing: I know that most people are right handed and it would make sense for the dominant hand to exert force to cut the food using the knife, so it is logical for the knife to be held by the right hand and the left hand transfers the food from the plate to the mouth, which is a simpler task compared to cutting up food.
I also should point out that, from where I come from, we only use the right hand to transfer food from the plate to the mouth for cultural/religious/transitional reasons. But the majority of the foods don't require cutlery (or if it does require, people use their bare hands anyway) -- again, that is from where I come from, but some do use cutlery, and when they do, they use hold the knives with the left hand and spoon/fork with the right hand for the reasons above.
Now some "modernized" people follow the European style strictly, meaning: knives only in the right hand and fork on the left hand. But they are looked down by the majority of the our society for using the wrong hand to eat. Some of the "modernized" people will appease both parties, by holding the knives with their right hand, and right after cutting up the food, they switch fork to the right hand so that only the "righteous" hand does the feeding, and it's a win-win.
That last part is what triggered me to ask the question, because that's just what happened in the movie. Although, I doubt that the father and son switched forks to their right hand for social or religious reasons. Maybe it's something to do with something else.. I don't know.