Pheromones are substances which are secreted to the outside by an individual and received by a second individual of the same species. Many examples exist in animals but their role in humans remains uncertain since adults have no functioning vomeronasal organ, which processes pheromone signals in animals. some data indicate that 16-androstene pheromones, in particular androstadienone, play a beneficial role in women’s mood, focus and sexual response, and perhaps also in mate selection. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3987372/
