Pubic hair

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In adults, pubic hair is the hair that covers the area around the sex organs. It is generally darker in colour and stronger in texture than other hair found on the human body. It is caused by the rising levels of androgens during puberty. Pubic hair is a secondary sex characteristic.

Pubic hair appears during puberty in girls and boys. The onset of pubic hair development is termed pubarche. In developed countries, this usually happens around the age of ten in girls and around the age of eleven or twelve in boys. Beginning with only a few hairs above the vulva (in girls) or penis (in boys), the area quickly fills out in a triangular shape, making a thick patch of hair. In boys, the patch becomes a trapezoid shape, meaning four-sided.

A line of hair from the navel toward the penis is sometimes called a happy trail or treasure trail. If there is a narrow line of hair from the navel to the pubic patch above the penis, the pattern is called sagittal. On some males, there is an upward-pointing triangle shape. In that case, the hair pattern is called acuminate.^[1] On males and females, pubic hair usually extends down past the pubic region and ending at the anus (the hole between the buttocks). In females, hair will cover the outer lips of the vagina; in males, hair will grow around the base of the penis and lightly cover the scrotum (the outer sack containing the testicles). Depending on each person's genetics, the amount and extent of hair can be different from one person to another.

Pubic hair is sometimes called a "bush," "nest," "pubes," or "curlies". On white European people, pubic hair is usually curly. On Asian people and Native Americans, pubic hair is usually not so curly.^[2] On most African (Black) people, pubic hair is tightly curled.

1. ↑ Setty LR (January 1967). "Varieties of the quadrangular abdominal hair pattern of white males". J Natl Med Assoc. 59 (1): 45–7. PMC 2611300. PMID 6038587.
2. ↑ Ogle, Robert R.; Fox, Michelle J. (1998). Atlas of Human Hair: Microscopic Characteristics. CRC Press. ISBN 978-1-4200-4836-0.