A pheromone is a chemical that mammals produce which change the behavior of other mammals of the same species. Pheromones are natural and behavior-altering. Many people associate pheromones with sexual behavior, but pheromones can do a lot more than affect someone’s sexual desires.
Pheromones are ectohormones, which means they act outside the body. They differ from most other hormones because of this factor. Pheromones affect other individuals, not the person who is secreting them.