My 10 year old son is making extremely bad choices lately, in regard to stupid lies. For example, when ask,"Did you brush your teeth?" His response is yes.. Several different occasions. Then when checked - he didn't brush his teeth. There is no family dynamic change. He is active in school, sports and overall is a great student. We, as a family, discourage and hate lying. We go to church and really stress the importance of character. I have grounded, spanked, made him write but nothing I do is changing the behavior. HELP!