Selma van Diest, Clinical Psychologist
         Brisbane (in-person) and online                                                                                                                            
                                              
                                                        Selma van Diest 
                               04 68 815 114                                       Clinical Psychologist                                          
                                                                                               
Gender, Sex & Relationships
  • About us
  • Gender
    • Gender Issues
    • Sexual Identity
  • Sex
    • What is Sex Therapy?
    • Libido Issues
    • Arousal/ Erection issues
    • Painful sex
    • Orgasm problems
  • Relationships
    • Relationship problems
  • Fees & rebates
  • Contact us

Diverse relationships

Relationships don't have to follow one particular script. While monogamy is the relationship structure most people are familiar with, many individuals and couples choose relationship styles that better reflect their values, identity, and emotional needs.
Whether you are curious about consensual non-monogamy, already practising polyamory, or simply wanting to better understand yourself and your relationships, therapy can provide a supportive and non-judgemental space to explore what works for you.
As a sex-positive, gender-affirming psychologist, I work with individuals, couples, and relationship systems of all configurations.
Understanding Different Relationship StructuresThere are many ways people choose to experience intimacy and commitment. Some commonly used terms include:
Monogamy – A committed romantic and sexual relationship between two people.
Monogamish – Relationships that are primarily monogamous while allowing occasional agreed experiences outside the relationship.
Swinging – Typically involves committed couples engaging in consensual sexual experiences with other individuals or couples, while maintaining their primary relationship.
Open Relationships – Relationships in which partners agree that one or both people may have sexual and, in some cases, romantic relationships with others.
Consensual Non-Monogamy (CNM) and Ethical Non-Monogamy (ENM) – Umbrella terms that describe relationship structures where people engage in multiple romantic and/or sexual relationships with the informed consent of everyone involved. The emphasis is on honesty, transparency, and mutual consent.
Polyamory (Poly) – Having more than one loving and consensual romantic relationship, with the knowledge and agreement of everyone involved.
Multiamory – A broader term often used interchangeably with polyamory, reflecting the possibility of multiple intimate relationships.

These labels can be helpful, but every relationship is unique. Rather than fitting neatly into one category, many people create relationship agreements that reflect their own values and needs.

​Relationships are more than sexual

One of the biggest misconceptions about consensual non-monogamy is that it is simply about having more sex.
In reality, relationships are complex and involve much more than physical intimacy. Different relationships may fulfil different needs, including:
  • Romantic connection
  • Sexual intimacy
  • Emotional closeness
  • Friendship and companionship
  • Shared life goals
  • Parenting and family
  • Personal growth and exploration
Every relationship is unique, and no two people define intimacy in exactly the same way.

The challenges are real

People sometimes assume that consensual non-monogamy is either easier or harder than monogamy. In reality, it presents different challenges.
Therapy often explores experiences such as:
  • Jealousy and insecurity
  • Attachment needs
  • Fear of abandonment
  • Trust and honesty
  • Managing multiple relationships
  • Navigating time and emotional energy
  • Communicating wants, needs and limits
  • Repairing conflict
  • Defining commitment
  • Exploring identity and authenticity
These conversations are not signs that a relationship is failing—they are often opportunities for greater understanding and deeper connection.

Communication is essential

Healthy relationships—regardless of their structure—depend on open, respectful communication.
When more than two people are involved, balancing everyone's needs requires honesty, flexibility, emotional awareness, and a willingness to have ongoing conversations. Expectations, boundaries, and agreements are rarely "set and forget"; they evolve as people and relationships change.
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​Is polyamory right for everyone?

Just as monogamy is not the right relationship structure for everyone, polyamory and other forms of consensual non-monogamy are not universally suitable.
The aim is not to decide which relationship style is "better," but to discover the relationship structure that best aligns with your values, identity, attachment needs, and life goals.
​

Agreements, Rules and Boundaries​

Healthy relationships rely on clear communication and mutual understanding.While these words are often used interchangeably, they describe different concepts.
Boundaries are about what I am comfortable with and how I will care for my own wellbeing.
Agreements are decisions that people make together about how their relationship will operate. Agreements are collaborative and are reviewed as relationships evolve.
Rules are expectations placed on another person's behaviour. Although some relationships choose to have rules, they are generally most effective when developed collaboratively rather than imposed.
Healthy agreements are not static. As relationships grow and life changes, ongoing conversations help ensure everyone's needs continue to be respected.

How Therapy Can Help

Whether you are exploring a new relationship structure, navigating conflict, managing jealousy, or wanting stronger communication, therapy offers a confidential and affirming space to better understand yourself and your relationships.
Together we may explore:
  • Understanding your relationship values
  • Clarifying needs, boundaries and expectations
  • Building trust and emotional safety
  • Navigating jealousy, insecurity and attachment patterns
  • Improving communication and conflict resolution
  • Supporting relationship transitions
  • Exploring intimacy, sexuality and identity
  • Strengthening connection while respecting each person's autonomy
My approach is inclusive, trauma-informed, and affirming of diverse relationship structures. I believe there is no single blueprint for healthy relationships—only relationships that are built with honesty, consent, respect, and care.

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​In our practice we welcome all people of any ethnicity, lifestyle choice, relationship structure, sexual orientation, gender identity or faith 
Selma van Diest
Clinical Psychologist
Gender, Sex and Relationships
​04 68 815 114