The notion is that perfume has the power to take you back in time and to evoke better, more cheerful memories. Whether you consider yourself spiritual or not, you might've heard of a similar idea: regression therapy. According to expert healer Kim Alexis, this is a relaxing and hypnotic experience whereby individuals are allowed to sense, feel, hear and see situations from another time and place. It's said to help people face mental, emotional and physical issues. The idea of using fragrance to unlock positive reminiscence might not be too dissimilar.
— Read more in I Tried ‘Perfume Regression’ To Feel Good Again & It Actually Worked at Refinery29.