Truth, why is it hard for some people?

Why is it so hard to get an honest answer? Most people say they want the truth, but only to a point! Even people that we grow up trusting seem to lie rather then admit to their mistakes. One of the things I just can not stand is someone who lies!!! I blame part of the peoples lack of ability to tell the truth on wanting to be a part of a sad society that encourages this rather then be their own person! One example that I believe had perpetuated this is being politically correct! I would rather be told the truth then not just to find out later and be hurt. Politically correct addicts always say what they don't really mean just to boost someones ego!