Page "Gender" Paragraph 60

Most societies have only two distinct, broad classes of gender roles, masculine and feminine, that correspond with the biological sexes of male and female.

However, some societies explicitly incorporate people who adopt the gender role opposite to their biological sex, for example the Two-Spirit people of some indigenous American peoples.

Other societies include well-developed roles that are explicitly considered more or less distinct from archetypal female and male roles in those societies.

In the language of the sociology of gender they comprise a third gender,