Essential oils and our memory

If a perfume can awaken memories that are completely forgotten and buried within us, why don't we use this ability to prepare for an exam?

How to do it:

As you study a subject over several days, apply each time a drop of a specific essential oil on your wrist (e.g. rosemary, tropical basil, bitter orange, or geranium).
Use the same method and permit the identical perfume accompany you during the exam situation. This will help your memory to access easier and to more detailed informations in you memory.