Independent education for adults 18+

Back to the glossaryConsent & relationships

Monogamy

A relationship structure in which partners agree to sexual and/or romantic exclusivity, with the exact scope defined by those involved.

Sources and evidence type

Manual claim and limitation notes are shown where an individual source audit is complete. Other evidence-type labels are a publisher aid awaiting source-by-source confirmation.

Anderson et al. (2026), relationship-structure satisfaction meta-analysisResearch study
Source design
Peer-reviewed research or review
What it can support
The specific population, measures and findings reported by the paper.
Important limitation
It cannot automatically establish UK prevalence, causation, diagnosis, consent or an individual outcome. Check recruitment, definitions and study design.
Open the original source
Rubel & Bogaert (2015), CNM and relationship-quality reviewResearch study
Source design
Peer-reviewed research or review
What it can support
The specific population, measures and findings reported by the paper.
Important limitation
It cannot automatically establish UK prevalence, causation, diagnosis, consent or an individual outcome. Check recruitment, definitions and study design.
Open the original source
Wilson et al. (2017), infidelity-definition researchResearch study
Source design
Peer-reviewed research or review
What it can support
The specific population, measures and findings reported by the paper.
Important limitation
It cannot automatically establish UK prevalence, causation, diagnosis, consent or an individual outcome. Check recruitment, definitions and study design.
Open the original source
Editorial still life of two interlocking brass rings, two blank conversation cards and two pencils symbolising an explicitly discussed monogamous agreement
EDITORIAL ILLUSTRATIONMonogamy

Consent & relationships

Illustration created using generative AI; not documentary evidence.

In brief

Exclusivity by agreement—not by unspoken assumption.

Monogamy is an agreement, not a single self-explanatory rule. Couples may define exclusivity differently around flirting, pornography, online contact, emotional intimacy or past partners. Clear expectations matter because social assumptions do not guarantee a shared definition.

Define the agreement

Discuss what exclusivity covers, how online activity is treated, which disclosures matter and whether expectations change during separation or travel. Avoid assuming that commitment automatically answers every boundary question.

An agreement can be revisited, but change requires mutual choice. One partner cannot unilaterally redefine a breach after it occurs.

Cartoon of two adults at a kitchen table comparing blank cards while discussing what exclusivity means to them
EDITORIAL ILLUSTRATIONDefine the agreement

A shared label is clearer when both people discuss what it includes, what it does not include and how questions can be raised.

Illustration created using generative AI; not documentary evidence.
Status
Detailed editorial draft
Publisher
The UK Kink Guide
Reviewed
Structured draft present; individual review date not recorded
Evidence
3 cited sources · types labelled below
Jurisdiction
UK-focused general education
Read the rest: evidence, law, safety and sources
Monogamy

A mutually understood agreement limiting sexual and/or romantic connections outside the relationship.

Serial monogamy

A succession of exclusive relationships rather than simultaneous partnerships.

Monogamish

An informal label for a mostly monogamous relationship with limited agreed exceptions.

Infidelity

Conduct that breaches a relationship agreement; the content of that agreement differs between relationships.

Consent within monogamy

Exclusivity does not create sexual entitlement within the relationship. Each activity still needs present consent, freedom and capacity.

Marriage, cohabitation and previous participation likewise do not provide standing permission or remove the right to withdraw.

Cartoon of two adults pausing on a park walk for an attentive relationship check-in
EDITORIAL ILLUSTRATIONConsent continues

Exclusivity does not create standing consent. Everyday check-ins keep affection, touch and sexual choices separate and current.

Illustration created using generative AI; not documentary evidence.

Wellbeing and fit

Monogamy may fit some people's values and needs and not others. Research does not support treating one consensual structure as universally more satisfying than another.

Relationship quality depends on many factors including communication, compatibility, safety and social support; structure alone does not diagnose health.

Sexual health and change

Partners should discuss testing, barriers and contraception rather than assuming exclusivity automatically establishes infection status. A new or broken agreement may change relevant health information.

Disclosure after a breach should prioritise informed health choices without using medical language as punishment or stigma.

Cartoon of two adults calmly reviewing a shared calendar as circumstances and relationship agreements change
EDITORIAL ILLUSTRATIONReview without blame

Health, identity, distance, care responsibilities and preferences can change. Revisiting an agreement is part of maintaining it.

Illustration created using generative AI; not documentary evidence.

Non-graphic examples

What the umbrella may include

  • Agreeing that both sexual and romantic exclusivity apply.
  • Clarifying whether online sexual interaction is within the agreement.
  • Reviewing expectations before a long separation.
  • Using current STI information rather than assuming exclusivity proves status.
  • Ending one relationship before beginning another under a serial-monogamy agreement.

Prepare for an appointment

Questions you could ask a professional

  • What information would help you understand my question?
  • What are the realistic options and uncertainties?
  • How can disability, communication or privacy needs be accommodated?
  • When should the situation be reviewed again?

These prompts do not replace assessment and do not imply that every reader needs professional care.

Continue learning

Take the next step from definition to context.

Continue with independent guidance connecting monogamy to evidence, consent, safety, uncertainty and practical decisions.

Consent & relationships guideConsent, boundaries and relationship practice

Put consent and boundaries into practice in adult relationships, with usable refusals, check-ins, repair and UK support routes.

Read the guide

Related in-depth reading

Read the full guide.

Explore a connected question with context and UK support routes.

Relationship diversityOpening up a relationship: a conversation guide

Questions to ask before changing a monogamous agreement, with room for a genuine no and respect for everyone involved.

Read the full guide
Consent & relationshipsAffairs and infidelity: repair, separation and support

What to consider after an affair: facts, accountability, sexual health, possible repair and the option to separate.

Read the full guide

Related explanations

Useful overlaps, not assumptions.

Consent & relationshipsConsent

A person's freely chosen, informed and continuing agreement to a specific activity or interaction while they have capacity to decide. Consent can be conditional, paused or withdrawn and is not supplied by silence, a relationship, a role or previous participation.

Read the explanation
Consent & relationshipsDesire discrepancy

A difference between partners in how often, when or under what conditions they want sexual contact. Difference does not create an obligation for either person.

Read the explanation
Consent & relationshipsOpen relationship

A relationship whose partners agree that defined sexual and/or romantic connections outside it are permitted.

Read the explanation

What should I do next?

Choose the route that fits your question.

Information can clarify a term, but it cannot decide consent, diagnose symptoms or assess a legal situation for you.

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