To my mind, it is totally impossible for the people, who really like this language and devoted this all their lifes. I have been learning English since the age of six and continue to do it now. So i have been learning this language for 20 years. Now i am interested in learning some set expressions and dialects. This information can not be taught at school, so i try to find some interesting and useful information by the means of the internet. I think that when we really want to do something or to learn something you would never stop. But if we do not want - nothing can make us to do something.