Why do pheromones affect women?

Please forgive me for sounding dumb, but how come pheromones men wear affect women the way they do, like some pheremone sprays say they help women and people open up to you and chat more, and some make them well lets say HORNY AS A TOAD!!! lol But seriously why do pheremones affect us at all and why do some of the sprays affect us and them in different ways?

Its chemistry.

Pheromones are hormones that work outside of the body. When inhaled they enter the brain and connect with the neurotransmitters causing them to fire and send a chemical signal. Neurotransmitters are where feelings and emotions are derived basically. Certain pheromones will trigger certain neurotransmitters causing certain emotions.

Pheromones are a major way all mammals communicate and humans are mammals. They don’t just affect women. They affect men as well.

Tisha