In brief
Lisa Diamond is a professor of psychology, health psychology, and gender studies at the University of Utah. Her research examines sexuality, gender, intimate relationships, sexual and gender expression, the biological and developmental conditions of desire, early-life adversity, and the implications of sexual wellbeing for health. She is especially known for the concept and study of sexual fluidity.
Diamond matters to the Sensual Institute because she separates experiences that are often collapsed into one label. Attraction, arousal, behaviour, identity, fantasy, relationship, and social role can influence one another, but they do not always move together. A person can experience a change in one dimension without owing anyone a new identity or a public explanation.
What sexual fluidity means
In Diamond’s research, sexual fluidity refers to the capacity for situation-dependent flexibility in sexual responsiveness. It does not mean that every person is equally fluid, that orientation is a choice, or that a particular identity is unstable. It describes a possible pattern of change in attraction or desire across time and context, and the pattern must be studied rather than assumed.
Fluidity can appear in short-term shifts, longer developmental changes, or differences between attraction, behaviour, and identity. A person may notice an attraction that does not become behaviour. Another may have a relationship that does not change their identity. Someone else may adopt a new label because an old label no longer fits, while another person keeps the same label through changing experiences.
The concept is therefore descriptive, not prescriptive. It should not be used to tell a lesbian, bisexual, heterosexual, queer, asexual, or unlabeled person what they will eventually become. Nor should it be used to justify attempts to change a person’s orientation. Research on variation is not permission for coercion.
Longitudinal evidence and the life course
Diamond’s longitudinal work follows people across time rather than treating a single survey response as a complete biography. Repeated measures can reveal continuity, change, uncertainty, and the effects of life events. They can also show that identity labels may be meaningful even when they do not predict every future feeling or behaviour.
Development is not a staircase toward a final category. Adolescence, adulthood, partnership, bereavement, parenthood, migration, illness, safety, community, and social recognition can all change what becomes possible to notice or name. Context does not manufacture a person’s experience, but it can affect whether an experience is safe, visible, interpreted, or acted upon.
Longitudinal research has limits. Attrition can remove participants whose lives are more precarious. Repeated questions can influence self-understanding. A sample recruited in one country or community cannot stand for all people. Change in a label may reflect discovery, language, social permission, or a shift in the relationship between private experience and public identity.
Attraction, identity, behaviour, and relationship
One of Diamond’s most important contributions is conceptual clarity. Attraction concerns who or what draws a person. Behaviour concerns what a person does. Identity concerns the language and social location a person claims, is given, or declines. Relationship concerns a bond with another person or people. These dimensions may align, but no single one can be used as a perfect substitute for the others.
This distinction is useful in clinical work. A client may be distressed not because their attraction is wrong but because they fear losing family, housing, employment, or a relationship. Another may be content with an unlabeled identity but pressured to provide a category. A third may need help distinguishing a genuine desire from a strategy for safety or belonging. The task is to listen without imposing a developmental script.
The same clarity helps partners. A change in attraction does not automatically prove betrayal, and a stable identity does not guarantee a stable relationship. Honest conversation requires room for uncertainty without turning uncertainty into a weapon.
Gender, embodiment, and health
Diamond’s work also connects sexuality and gender with health across the life course. Sexual wellbeing is not an ornamental extra; it can be related to stress, social connection, mental health, and physical wellbeing. At the same time, sexuality should not be reduced to a health outcome. A person’s intimate life has meanings that are cultural, relational, pleasurable, spiritual, political, and private.
Research on sexually and gender-diverse people must attend to structural conditions. Discrimination, minority stress, medical mistrust, isolation, and unequal access to care can shape both health and the willingness to participate in research. If a study records disparity without examining the conditions producing it, it risks turning injustice into an individual trait.
Embodied attention here means noticing how social safety enters the body. The ability to feel, disclose, flirt, rest, or seek care depends partly on whether a person expects punishment or recognition. Sensuality is personal, but its possibilities are never entirely private.
Misuse and ethical boundaries
Sexual-fluidity research is vulnerable to misuse. A finding that some people experience change cannot be converted into a claim that everyone can be changed. Nor can it be used to undermine a person’s current identity, demand sexual access, or argue that oppression is harmless because identities are not identical across all time.
Researchers and educators should distinguish flexibility from voluntariness. An experience may be capable of change without being controllable by will. A person may welcome change, grieve it, resist it, or feel neutral. All of these responses belong to the person, provided they are not being coerced.
Good practice also avoids treating bisexuality or unlabeled identity as confusion. A category can be stable even when attraction is varied, and a person can be uncertain without being incomplete. The right language is the language that helps the individual live with dignity and agency.
Human-capacity bridge
Diamond’s work supports dimensional discernment, separating attraction, identity, behaviour, and relationship; developmental patience, allowing experience to unfold without a compulsory endpoint; identity sovereignty, respecting a person’s right to name or not name themselves; and contextual compassion, understanding that safety and recognition shape what can be lived.
For the Institute of Inner Technology, the bridge is a practice of spaciousness. Sensual intelligence does not require a fixed story or a permanent one. It requires enough honesty to notice change and enough respect not to turn change into an obligation.
What this changes
Lisa Diamond has helped sexuality research move beyond the assumption that every person’s intimate life must fit one rigid timeline. Her longitudinal and interdisciplinary work makes room for continuity, change, multiple forms of diversity, and the difference between a population pattern and an individual life.
The ethical lesson is that complexity should enlarge freedom. A person may revise a label, keep it, use several labels, or use none. Research can offer language and context; it cannot claim ownership of the experience.
Related entries include Sexuality, Identity, Gender, Learning, Belonging, and Agency.
Related entries
sexuality, identity, gender, learning, belonging, agency.