The stinking fuss about stench in two city barangays (formerly barrio, in Spanish) reminds me of an anecdotal court case whose outcome swung on the testimony of an expert witness. The prosecution witness had a reputed ability to distinguish odors of a wide range of chemicals and substances. He was to identify and pinpoint the source of the foul and obnoxious odors permeating a certain locality.
Some firms deny making use of a nasal anesthetic, saying that their products employ a combination of masking fragrances and odor counteractants which is curiously, the similar-sounding term malodor counteractant used in scientific journals, a code word for nasal anesthetic.
Modern chemistry has made great strides in two fields affecting human lives: in food flavors and in perfumes and aromatics. Analysis of chemical components of the aromatics in foods and botanical fragrances enabled chemists to synthesize chemicals mimicking the scent of practically all flavors and fragrances.
In the English-speaking world, practitioners tend to emphasize the use of oils in massage, and aromatherapy tends to be regarded as a complementary modality at best and a pseudoscientific fraud at worst.