The
universal word for genitals regardless of gender.
It is unknown exactly how the word developed, although most scholars agree it grew out of the word "thing", often used by women as a delicate way of describing male genitalita.
Male genitalia has 2,469 words to describe it, while only a few words are used for the equivalent
female body part, most of them old
Anglo-Saxon words, or words bordering on the obscene. The word "genitalia" itself is rarely used, since it sounds too doctor-ish.