How pheromones can be detected?
Pheromone signals are detected through the Vomeronasal Organ (VNO). When the VNO detects the pheromone, it sends a sexual response signal to the brain. You do not have to smell a pheromone to be affected by it it has been shown that even very tiny quantities which are too diluted to have any odor still have an effect on the brain.