Humans secrete pheromones, can detect them, and respond to them. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3987372/ https://www.ncbi.nlm.nih.gov/pmc/article

Humans secrete pheromones, can detect them, and respond to them. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3987372/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3987372/ https://academic.oup.com/beheco/article/15/4/579/205993 https://academic.oup.com/beheco/article/15/4/579/205993 We use our noses to detect them. It is a wonderful article.