Here's something that could be considered "disturbing". Perfume companies accidentally discovered how they can exploit the T. gondii parasite hijacking the brains of humans.

An interesting study of why "Chanel #5" perfume was such an historical success. http://www.slate.com/articles/health_and_science/science/2012/07/chanel_no_5_a_brain_parasite_may_be_the_secret_to_the_famous_perfume_.single.html

Cat pheromones are used in "Chanel #5". With the high prevalence of Toxoplasma gondii in the male population in France (due to their cultural practice of eating raw and undercooked meats infected with this cats' parasite), men who have had their brains hijacked by this parasite are attracted to these cat-scents in the perfume. This is how "Chanel #5" became so popular.