Morality Police! Morality Police! Our view should be everyone's view!
'Cause everyone knows morality is entirely relative; there is no right or wrong, good or evil, and the whole field of ethics is merely a collection of "views" with no way to judge between them.
/end sarcasm
Relativism is a logically bankrupt idea, and has been demonstrably so at least since Socrates. The statement "truth is relative" is self-defeating. For truth to be relative, it must be objectively true that truth is relative, a self-contradictory statement if there ever was one. Also consider that in order for such a statement to be true it must also be not true, depending on the perception of one who considers it. Therefore, for one person, truth may not be relative at all and for him it would be true to say "Truth is not relative, but objective". The case for relativism just goes down hill from here, e.g. two plus two ALWAYS AND OBJECTIVELY equals four.
If relativism is a false god, then, at some level, there is truth to be had about what is good and what is evil, and by extension what is a good way to live and what is a bad way to live. There is no more important question to mankind than how one ought to live. If there is an answer to be had to that question, as the possibility for objective truth suggests, then it behooves us to seek out an answer if we are to be responsible human beings.
Therefore, foolishness does not lie in making a claim as to how one ought to live, but in brushing off the making of such a claim as foolish. To claim that no one should be able to say what is moral and what is not, is merely an excuse not to think and evaluate.
As for Hellbinder's statement, I think there is some truth to what he says, although probably for vastly different reasons than he does. Sex is, by it's very nature, a tremendously seductive thing, with a huge impact on what people say and do. It therefore has the potential to distract us from potentially more important things. Human beings are certainly capable of far more than the practices of animals, i.e. sex. When humans allow sex to be the prime mover in their lives, they limit themselves to an essentially bestial existence. While perhaps most people don't seem to be capable of much more than that, think about how many people are but never fulfill their potential. Consider for a moment how many young women think of nothing but enhancing their own sex appeal. They do so, going back to Hellbinder's point, because from a very early age they are bombarded with sexuality, such that, as they mature and develop, sexual attractiveness is the only virtue they know. That is a tragedy, and perhaps if you stopped to think a little bit, rather than just dismiss all moralizing as foolishness, you would see why.