Attitude

My question to all is, do all 15 year old boys come with such attitudes. I have a feeling that the "I know it all attitude" is not just Coles but a majority of the teenage population. Being a mother of four children I think I am in for a long journey. Why is it that they always have to learn their lessons the hard way instead of listening to their parents who have probably made similar mistakes. We all want whats best for our children and I can only hope that we are doing a good enough job that he will grow to be a very great young man.