Fleximonogamy is a relational structure that allows for a primarily monogamous relationship while incorporating elements of non-monogamy under specific circumstances or agreements. This approach provides a flexible framework where partners can engage in romantic or sexual activities with others, but typically within negotiated boundaries, which may vary over time.

In fleximonogamy, couples often establish clear rules and limitations regarding outside interactions to ensure that both partners feel secure and respected. This can include stipulations on emotional involvement, physical intimacy, or the frequency of interactions with other partners. For example, a couple may agree that one partner can go on dates with others while maintaining their primary emotional connection with each other.

The concept emphasizes communication, trust, and consent, making it essential for partners to regularly check in and reassess their boundaries as their needs and circumstances evolve. Fleximonogamy can appeal to those who value the emotional stability of monogamy but also wish to explore connections outside their primary relationship in a consensual and ethical manner.