Rive Gauche is a powerhouse?
I didn't think much of Kouros when I first tried it. I only warmed to it when I wore it one summer.
Let's see. So far we have "smells like urine", "smells not like urine, but the disinfectant cakes they have in urinals", that the latter noses are olfactorily challenged as neither of the two opposite smells are present, and now your contribution of "urine-like sourness", which you will note does not actually accord with either the first two views.
I think Kouros could probably be described as being more niche-like than most niche scents.