It's interesting you say that. Most of the barnyard, sexual, and body part swear words are the ones that come from German origin. The words of French origin are the ones that are considered polite. Sexual intercourse, derriere, manure - all French. I'll let the rest of you think up the German replacements.
So at its hearts, the ban on these words is a racist assessment that the Germans are too course and crude in their language to be used in polite company.
> Most of the barnyard, sexual, and body part swear words are the ones that come from German origin.
In Victorian times, polite people would never refer to a dress with mud on it as "dirty," but as "soiled." Dirt was derived from the Norse "drit," which meant excrement. As it became an English word, it maintained a strong negative connotation. That connotation is now largely gone, and one can say "dirt" in polite company.
The same will happen with all the expletives used today. That's just the way of things.