[baddox]

What's best for society, or what's "moral," is a different matter. It's still by definition impossible to make a choice that is not one's preferred choice, so it's silly to recommend someone to do so. I realize that this is a bit too semantic for everyday usage (thus you could reasonable tell someone "don't murder someone even if you want to"), but I think it's an important distinction to make if we're waxing philosophical.