Purity of expression

What do you think of when you hear the words "purity of expression" ? Well the other day I was listening to some one say that he wasn't happy when a "bitchy [sic] english professor" seemed unconcerned his purity of expression. This got me thinking, why is out purity of expression being stomped on daily? The fact of the matter is that we are being molded into conforming into society every time we get a bad grade for having missed the point of an assignment. But what if we hadn't missed the point? What if the point was there its just that the teacher didn't appreciate that it was done exactly how they wanted it. Much of what we say and do is skewed by what others want to hear. Imagine a world where everyone expressed them selves purely. it would be EXCELLENT! But this is not the case, most of what we say isn't pure at all. take for example people that censor themselves. Instead of coming out a straight up saying "fuck", which would be pure in expression because it is raw and untainted, because it is what was meant. It shows the emotions of what the person is feeling and far more effectively conveys the message. We have people that instead of expressing themselves purely saying things like "frek" or "fck", which to me is tainting what u mean to please others. Purity of expression does not mean swearing at all. In fact swearing itself can be tainting people's purity of expression. Take for example when a person curses every few words or so, all the time. That too taints the purity of his or her expression, because it is not allowing them to put out what is foremost on their minds. Instead they are diluting their words with pointless meaningless profanity, which when they need to use it to convey their emotion of anger or sadness may be lost on his or her audience, because the audience cannot see the true meaning behind it. So the point is to be pure in your expression, say what is pure and not what people want you to say.