I believe this was deliberate - it was a way to keep parents out and keep it appealing to teens. It is like slang, it changes every generation so that teenagers

I believe this was deliberate - it was a way to keep parents out and keep it appealing to teens. It is like slang, it changes every generation so that teenagers have a private language which their parents and teachers are excluded from. Whether it was a good idea or not, I don't know. But I believe that was their thinking at least.