A perfume is an odor, or more often a fragrant composition more or less persistent, naturally emitted by a plant, an animal, a mushroom etc ... In the nature, the perfumes are often chemical and biochemical messages, and in particular pheromonesor phytohormones.It can also be the emanation of a natural substance, a flower extract for example, or created or recreated from different flavors, solvents and fixatives for cosmetic use or perfume.It is then generally made from plant essences and / or synthetic molecules