What is an open marriage?
An open marriage is a marriage in which both partners mutually agree that each may pursue sexual or romantic connections outside the relationship. It is a broad term covering many arrangements — from occasional swinging to ongoing outside relationships — and is defined by the agreement itself, not by any fixed structure.
An open marriage is defined by one thing above all others: explicit mutual agreement. Both partners have chosen and consented to the arrangement — it is not one person permitting while the other tolerates, and it is not one partner acting unilaterally while the other pretends not to know. The agreement may be simple or detailed, but it must be real and ongoing.
The term covers a wide range of practical arrangements. Some open marriages function much like swinging — the couple attends events together, meets other couples as a unit, and both partners play together or in parallel. Others are more individually oriented: each partner may have their own outside connections, with the primary couple as the stable foundation. Some open marriages include emotional relationships; others restrict outside connection to purely physical encounters. The structure is defined by the couple themselves, not by any external template.
Open marriage differs from swinging in that swinging is typically understood as event-driven, couple-anchored, and primarily recreational. Open marriage is a broader relationship structure that may or may not include a swinging dimension. A couple who swings is usually practicing a form of open marriage, but someone in an open marriage is not necessarily a swinger. The Lifestyle community is primarily organised around swinging, though many members describe themselves as being in open marriages.
Open marriage also differs from polyamory. Polyamory places emotional romantic relationships with multiple people at the centre; open marriage may include or exclude that element depending on what the couple has agreed to. Some people draw the line at outside romantic attachment and permit only physical encounters. Others make no such distinction. The key is that whatever the couple decides, both partners understand and consent to it.
If you are considering opening your marriage, the most important first step is a thorough, unhurried conversation with your partner — not about logistics or platforms, but about what each of you genuinely wants, what you are concerned about, and what would need to be true for this to feel safe and good for both of you. JoinTheSwing is built for couples who have done that work and are ready to explore within a verified, discreet community.