The most asked question nowadays when it comes to sexual attraction is What are pheromones? They are chemical compounds naturally produced by every living organism.

They affect the behavior and development of others of the same kind by sending subliminal olfactory signals of very powerful social or sexual responses.

Pheromone is a Greek word derived from the word ?ρω (ferro) ? transmit and ορμ?νη (hormone) ? excite/stimulate. It was first introduced by Peter Karlson and Adolf Friedrich Johann Butenandt in 1959.

The chemical compounds can be found in all living things and represent the most ancient form of communication. There are different types of pheromones ? that trigger an alarm signal, sexual attraction, aggression and many more.

They are used often by insects, but occur in other groups of animals, and may consciously be detected at considerable distances and sometimes replace verbal communication. They are used to find a partner, mark territory and signal sexual interest.

For example, mares in estrus emit a pheromone, which is able to attract the studs from a significant distance.
Ants use them to communicate. When an ant gets a source of food, it begins to secrete a pheromone in its way back to the nest to leave a kind of smelly path.

In humans there are pheromones used to attract the opposite sex. Such are Androstenone, Androsterone and Copulins for example.