Controlling Purpose.

I have once more changed the whole idea of my paper because I have unsuccessful in finding credible sources for my original topic. My topic is now strictly premarital sex. No more relationship issues. Strictly, premarital sex. Why is it "wrong" and why are we so often being advised against doing it? My controlling purpose is to examine the ways in which we are told to abstain from premarital sex and why we should abstain from premarital sex in order to determine whether the debate over "is it harmful or not" is legitimate and worth debating. At the time I came up with this controlling purpose I thought it was specific enough, however, now that I have started to write my paper I now find that perhaps it is too general and it needs to become more specific. I want to know why the church and government are trying so hard to tell us not to have sex before marriage. Why is the government spending millions of dollars to tell us not to have sex before marriage? What is the big deal?