Books on sexology
Money co-edited a 1969 book, Transsexualism and Sex Reassignment, which helped bring more acceptance to sexual reassignment surgery and transsexual individuals. Money introduced numerous definitions related to gender in journal articles in the 1950s, many of them as a result of his studies of intersex morphology. His definition of gender is based on his understanding of sex differences among human beings. According to Money, the fact that one sex produces ova and the other sex produces sperm is the irreducible criterion of sex difference. However, there are other sex-derivative differences that follow in the wake of this primary dichotomy. These differences involve the way urine is expelled from the human body and other questions of sexual dimorphism. According to Money's theory, sex-adjunctive differences are typified by the smaller size of females and their problems in moving around while nursing infants. This then makes it more likely that the males do the roaming and hunting.
Sex-arbitrary differences are those that are purely conventional: for example, color selection (baby blue for boys, pink for girls). Some of the latter differences apply to life activities, such as career opportunities for men versus women. Finally, Money created the now-common term gender role, which he differentiated from the concept of the more traditional terminology sex role. This grew out of his studies of intersex people. In his studies of intersex people, Money alleged that there are six variables that define sex. While in the average person all six would line up unequivocally as either all "male" or "female", in an intersex person any one, or more than one, of these could be inconsistent with the others, leading to various kinds of anomalies. In his seminal 1955 paper, he defined these factors as:
assigned sex and sex of rearing
external genital morphology
internal reproductive structures
hormonal and secondary sex characteristics
gonadal sex
chromosomal sex
and added: "Patients showing various combinations and permutations of these six sexual variables may be appraised with respect to a seventh variable:
7. Gender role and orientation as male or female, established while growing up."
He then defined gender role as:
"all those things that a person says or does to disclose himself or herself as having the status of boy or man, girl or woman, respectively. It includes, but is not restricted to, sexuality in the sense of eroticism. Gender role is appraised in relation to the following: general mannerisms, deportment and demeanor; play preferences and recreational interests; spontaneous topics of talk in unprompted conversation and casual comment; content of dreams, daydreams and fantasies; replies to oblique inquiries and projective tests; evidence of erotic practices, and, finally, the person's own replies to direct inquiry."
Money made the concept of gender a broader, more inclusive concept than one of masculine/feminine. For him, gender included not only one's status as a man or a woman, but was also a matter of personal recognition, social assignment, or legal determination; not only on the basis of one's genitalia, but also on the basis of somatic and behavioral criteria that go beyond genital differences. In 1972, Money presented his theories in Man and Woman, Boy and Girl, a college level textbook. The book featured David Reimer as an example of gender reassignment.
In his book Gay, Straight and In-Between: The Sexology of Erotic Orientation, Money develops a conception of "bodymind". "Bodymind" is a way for scientists, in developing a science about sexuality, to move on from the platitudes of dichotomy between nature versus nurture, innate versus the acquired, biological versus the social, and psychological versus the physiological. He suggested that all of these capitalize on the ancient, pre-Platonic, pre-biblical conception of body versus the mind, and the physical versus the spiritual. In coining the term "bodymind", in this sense, Money wishes to move beyond these very ingrained principles of our folk or vernacular psychology.
Money developed a view of "Concepts of Determinism" which, transcultural, transhistorical, and universal, all people have in common, sexologically or otherwise. These include pairbondage, troopbondage, abidance, ycleptance, foredoomance, with these coping strategies: adhibition (engagement), inhibition, explication. Money suggested that the concept of "threshold" – the release or inhibition of sexual (or other) behavior – is most useful for sex research as a substitute for any concept of motivation. Moreover, it confers the distinct advantage of having continuity and unity to what would otherwise be a highly disparate and varied field of research. It also allows for the classification of sexual behavior. For Money, the concept of threshold has great value because of the wide spectrum to which it applies. "It allows one to think developmentally or longitudinally, in terms of stages or experiences that are programmed serially, or hierarchically, or cybernetically (i.e. regulated by mutual feedback)."
