Pubic Hair

There are a number of theories on why pubic hair exists, but no definitive answer. However, most sources agree that pubic hair relates to pheromones — scents that the body produces that can be sexually stimulating to others.

Humans have the same number of hair follicles as apes, except our body hair is generally very fine or barely visible in comparison.  Yet pubic and underarm hair tends to be more visible and coarse. It is believed that the tufts of hair around the genitals, as well as under the arms, release pheromones, which may act as erotic aids.

Image from pillpat (agence eureka) flickr

From a book called Anatomie Femme (1939) complete set here

Pheromones get trapped in the pubic ‘do when apocrine glands release an odorless secretion on the surface of the skin that combines with bacteria decomposed by the secretions of the sebaceous glands. The resulting scent is different for individuals due to a genetic complex called the Major Histocompatability Complex (MHC). Studies suggest that women are attracted to men with very different MHCs than their own, perhaps because genetically diverse offspring may be more able to fight off disease. For some people, scents from these areas are noticeable and consciously increase sexual arousal. For others, pheromones might not be obvious but may be detected subconsciously. For more information about pheromones and their effect(s) on sexuality, look for James Vaughn Kohl and Robert T. Francoeur’s book, The Scent of Eros: Mysteries of Odor in Human Sexuality(from link)

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