Ants have it! Dogs use it to attract their mate and defend their territory. It is what drives the male moth situated miles away from the female moth to reciprocate and respond to the mating invitation. It is what makes you instantaneously get attracted to the woman or man of your dreams. Still seems fishy? 'It' is nothing other than the wonder chemical, pheromones, at work. Someone rightly said that 'love is a matter of chemistry'. We now know that this is indeed true.
The study of pheromones represents one of the most fascinating areas of reproductive biology. The term pheromone is used to refer to any chemical substance produced by a living organism, that triggers a change in the sexual behavior of another organism, of the same species, but of the opposite sex.