Pubic hair is the growth of hair around the pelvic bone and on the upper thighs of both men and women. The growth of this hair starts in puberty as sex hormones in the body begin to develop. It is considered one of several secondary sex characteristics, which distinguish males and females but not directly related to reproduction.
There are a few theories about why we have pubic hair, but many sources agree that it relates to pheromones. Phermones are hormones that are released from the body and are believed to be important in sexual attraction.