It has been said that having no pubic hair is normative; however, findings from this study suggest that there is no one dominant pubic hair style. Given the growth rate of hair and women’s often sporadic hair removal, there is likely great diversity in the amount of pubic hair that women have at any given time. After all, pubic hair is in a constant state of growth, which suggests that pubic hair “style” may be a malleable concept.
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Pubic Hair Removal among Women in the United States: Prevalence, Methods, and Characteristics
Feministing commenters seem to be corroborating this finding.