Institute of Substantive Sexology

Quality
and Warmth

The highest standards of rigour in the services we provide, combined with the closest and most caring warmth in the way we treat people. Academic rigour and human warmth: not incompatible — essential.

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2012Year founded
+10Years of practice
4Conceptual map axes
6Mission lines

Quality and Warmth

The Institute of Substantive Sexology strives to offer the highest and most demanding quality in the services it provides, accompanied by the closest and most caring warmth in the way it treats people.

We were founded with the conviction that academic rigour and human warmth are not incompatible, but complementary and essential for accompanying people in their exploration of sexuality.

History

2012 — 2026
2012
Foundation

ISESUS is born as an academic institution dedicated to the development, production and dissemination of Substantive Sexology.

2013
Master's in Substantive Sexology

Launch of the first specialised postgraduate programme, a benchmark in in-person sexological training.

2015
ISESUS Publishing

Creation of the publishing imprint to publish and disseminate the theoretical corpus of Substantive Sexology.

2021
Digital transformation

Deep renewal of team and offering. Launch of the Online Academy and new training and intervention programmes.

2026
Sexological & psychological therapy

Incorporation of individual and couples therapy services, in-person and online.

Mission

01
Research & innovation

To be a factory of research, creation and innovation in Substantive Sexology.

02
Academic benchmark

To be an academic benchmark for a Substantive Sexology built on rigour, quality and warmth.

03
Interdisciplinary dialogue

To contribute to a sexology that dialogues with other disciplines, importing and exporting knowledge.

04
Cooperation between the sexes

To be an active agent promoting cooperation and synergy between the sexes.

05
Intellectual vanguard

To help build a new sexual order based on synergy, responsibility, justice and reason.

06
Feminist ethics & science

To harmonise feminist ethical purposes with sexological scientific knowledge.

What is
Substantive Sexology?

Substantive Sexology is a way of understanding and studying sex that starts from a fundamental idea: sex is not merely an activity, a set of practices, or a health topic. Sex is a constitutive dimension of the person. It is not something we simply "do" — it is something that forms part of who we are.

"It is not only something we do: it is something that shapes our biography."

Much of the discourse on sexuality focuses on behaviours, risks and dysfunctions. Substantive Sexology does not ignore those aspects, but does not start there. It starts by understanding the phenomenon at its base — before speaking of "sexual problems", it is necessary to understand what sex is as a human reality.

Bodily
Somatic dimension
Psychological
Experiential dimension
Relational
Relational dimension
Historical
Biographical dimension
→ Sex education is not limited to preventing risks
→ Clinical intervention is not reduced to correcting symptoms
→ Reflection on identity and desire rests on a solid conceptual foundation

The Substantive Sexology map

04 axes
01
Ontological axis

The territory of Sex

Substantive Sexology starts from a nuclear thesis: sex is a constitutive fact of living reality. It is not an addition, nor a behaviour, nor a preference. It is structure.

The evolution of sex in the History of Life
Sexuation as a process of sexual differentiation
Sexual characters: genetic, gonadal, hormonal, somatic, cerebral
Gradations and intersex conditions
Founding fact

Sex is present from the start of life and accompanies the person throughout their entire biographical journey. This is why we speak of the human being as a sexed being: someone whose sexual condition forms part of their identity and history.

ISESUS reference
§ Another Perspective — ISESUS Publications
02
Processual axis

Sexuation & Sexation

How does one come to be male or female? Two processes that are commonly confused must be carefully distinguished.

Sexuation: biological and psychic process of sexual differentiation
Sexation: process of labelling, recognition and social assignment
Understanding intersex conditions without reductionism
Conceptual framework for trans experience
Key distinctions

These distinctions help better understand situations such as intersex conditions and trans experience, without simplifications or reductionisms. The ontogenetic level describes how the sexed individual is configured.

ISESUS reference
§ Terms, Concepts and Reflections for a Sexological Understanding of Transsexuality
03
Dynamic axis

Sexation of desire

Who do I find desirable? Being male or female is not enough. Desire is oriented.

The sexation of desire: gynaerastia and andraerastia
Erotic orientation
The diversity of the homosexual mosaic
Bisexuality and its gradations
Desiderative level

Sexual desire is not a simple preference or behaviour: it is a structuring dimension of the person that orients itself towards others. Erotic sexation describes towards whom that desire is directed and how it is configured in each individual.

ISESUS reference
§ Homos and Heteros: Andraerastas and Gynaerastas
04
Relational axis

Interaction: Erotic, Amatory and Couple

How do we co-exist sexually? Sex does not culminate in identity or orientation. It unfolds in relation.

Human sexual response
The loving bond
The couple as a sexological institution
Parental synergy
Coexistence of the sexes
Interactive level

The relational level is where sex becomes visible in everyday life: in shared desire, the bond, the couple, the family. The erotic and the amatory are the two great territories of this interaction.

ISESUS reference
§ Materials for a Theory of Couples

Synthetic structure of the map

The Substantive Sexology map does not revolve around "problems", "behaviours" or "sexual health". It revolves around sex as a noun: as constitutive, evolutionary and differentiated reality. All of this traversed by an epistemological plane that critically reviews historical notions of sex.

01Phylogenetic level — Evolution of sex
02Ontogenetic level — Sexuation of the individual
03Desiderative level — Sexation of desire
04Interactive level — Erotic and Amatory

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