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.