Smegma

Smegma [smeg-muh] (Greek for ‘soap’), sometimes described as a ‘cheesy substance,’ is a combination of exfoliated (shed) epithelial cells, transudated skin oils, and moisture. It occurs in both female and male mammalian genitalia. In human females, it collects around the clitoris and in the folds of the labia minora.

In human males, smegma is produced and can collect under the foreskin. In healthy animals, smegma helps clean and lubricate the genitals. In veterinary medicine, analysis of this smegma is sometimes used for detection of urogenital tract pathogens.

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