Yes - Lust is very indolic! And you're right in that indoles do not necessarily smell fecal, though sometimes indoles are a part of what gives feces their smell ( sorry to be unpleasantly graphic ). To me they smell something like magic markers but with sort of a rubbery-fleshy undertone.
A perfect example of easily-identified indoles is in stargazer lilies. They commonly sell these at florists, and smelling up-close the indole is usually quite evident; more so than in most flowers.