Wolf, FNY, DY: I believe the idea of “Naval” is that all of these things are inherantly muttar (in moderation), and the Torah does not Asser them. However, there is an Mitzva not to be a “Glutton”, either in food, drink, women, etc. Reshus means that the action individually is muttar, but in context it is a mitzva not to do it.
“Morality” might come from “Yashar V’Tov”, but that once again is very subjective.