As with other animals, pheromones may also enter into the picture, though less significantly. Theoretically, the "wrong" pheromone may cause someone to be disliked, even when they would otherwise appear attractive. Frequently a pleasant smelling perfume is used to encourage the member of the opposite sex to more deeply inhale the air surrounding its wearer[citation needed], increasing the probability that the pheromones from the individual will also be inhaled. The importance of pheromones in human relationships is probably limited and is widely disputed,[1] although it appears to have some scientific basis.
