 Second, take the idea-construction of sex concepts. Our concept of sex is said to be a product of social forces in the sense that what counts as sex is shaped by social meanings. Standardly, those with XX-chromosomes, ovaries that produce large egg cells, female genitalia, a relatively high proportion of ‘female’ hormones, and other secondary sex characteristics (relatively small body size, less body hair) count as biologically female. Those with XY-chromosomes, testes that produce small sperm cells, male genitalia, a relatively high proportion of ‘male’ hormones and other secondary sex traits (relatively large body size, significant amounts of body hair) count as male. This understanding is fairly recent. The prevalent scientific view from Ancient Greeks until the late 18th century, did not consider female and male sexes to be distinct categories with specific traits; instead, a ‘one-sex model’ held that males and females were members of the same sex category. Females’ genitals were thought to be the same as males’ but simply directed inside the body; ovaries and testes (for instance) were referred to by the same term and whether the term referred to the former or the latter was made clear by the context (Laqueur 1990, 4). It was not until the late 1700s that scientists began to think of female and male anatomies as radically different moving away from the ‘one-sex model’ of a single sex spectrum to the (nowadays prevalent) ‘two-sex model’ of sexual dimorphism. (For an alternative view, see King 2013.)