Check out this article from our friends at Planet Fashion TV
Human pheromones are chemicals that send subconscious scent signals to the opposite sex...
....and can trigger very powerful sexual responses. Your body naturally emits pheromones every day. The scent signals from pheromones are picked up through an organ 3 inches inside the nose called the Vomeronasal Organ (VNO). When the nose detects the pheromone, it sends a sexual response signal to the limbic region of the brain, which controls our emotions and sexual desires.
When these sexual and romantic feelings are activated, your brain releases a chemical called phenethylamine, which in turn kicks on dopamine production. The result can be quite powerful and you do not have to smell a pheromone to be affected by it.