In recent years, scientists have taken an interest in pheromones for women. Even plants use pheromones to send messages about predators and environmental conditions.
Animals use these sophisticated chemicals to communicate with each other and leave "messages" for other members of their species. These researchers already know that pheromones are a common phenomenon in the animal kingdom; most animals have the ability to emit and detect pheromones.

This makes us much different than any other animals in the world, as we have taken our sexual creativity to the thresholds of the impossible. I guess it's just because to remain a friendship between the opposite sexes is much more difficult than the same sex. Because the pheromone response developed comparatively early in the history of evolution, some scientists believe that the human response to pheromones is controlled by what is commonly referred to as the "reptile brain." This autonomous part of the human brain is a holdover from more primitive life forms; unlike the parts of the human brain that are responsible for reasoning and intellect, this section of the brain is not under conscious control.
A woman who takes hormonal birth control may be emitting an unusual set of pheromones; because she is not on a regular cycle of ovulation, she will never produce the pheromones that are typically released at the peak of her fertility.