private life versus public life

When trying to put into my mind on a personal life versus public life , to what extent are the boundries. Going off of the public life of Senator Craig, he is supossed to be against same sex marriages and that a man and woman are only supossed to be together, But for Senator Craig he has put himself into a mess in the bathroom. I for the situation on the account for the private life i think there should be a difference on the letting people not be in each others business and have a life. Personal life should be if only you put yourself out there for others to pay attention to you.