was wondering who would notice that first
... or have the lack of decorum to post about the noticing.
Decorum what's that
That's, like, your drapes and your furniture and stuff like that!
No, but try
wiki to start. Pay particular attention to the section describing "social decorum."
Once you have made it past this "loosely herded" account of the possible meanings implied by the use of such a powerful word, you will at least be more qualified to know which direction your further research might lean.
I can recommend a light study of Latin as a way toward a better understanding of a great many languages.