I'm not sure what you mean, could you give an example? Yes and no, depends on the context. Ultimately one could argue that there is no such thing as purpose, merely existence, and I can't argue against that with logic alone, I just think it's a philosophy that leads to early extinction, and my morality stems from survival. I prefer the word "purpose" in this context because "function" could mean "the way something is in fact functioning", and I'm saying that if something is currently functioning so as to decrease the odds of survival, we may say that it's current function is contradicting it's purpose. I choose to regard survival as the ultimate source of purpose. Survival. Beyond that, surviving well, flourishing, but that is more subjective, survival is the objective underpinning of this. I made the case to you previously that pornography lacks certain redeeming qualities of alcohol, namely social and cultural assets. Yes, if the government has any value to society, it is in protecting society from harm. At the very least, those in government should have moral compasses guided by the long-term interests of the society. They should also be intelligent enough to understand the harmful effects of pornography on society and include that as one factor in relevant policy decisions.