Have you noted the presence of coffee beans in perfume stores ?
I have ….so immediately made the link between odor of fragrances and the question about these beans , perhaps coffee beans permit to smell a new perfume without the odor of the latter.
The answer is right.
Smelling coffee aroma between perfume sample permit to perceive odor intensity of the perfume from sample to sample stayed at the same ager smelling coffee aroma while it decreased when smelling air between samples.
Coffee beans is the best way to clean the nose and increase sensitivity for the next evaluation !