Relationship and sex therapist Michelle Kasey explains the different types of non-monogamous relationships, why they’re on the rise, and the pros and cons of exploring them. The purpose and expectations of modern relationships have significantly evolved over time. Historically, people predominantly came together in marriage and partnership for financial stability , survival and to maintain social order.

Today, as explored by renowned therapist and author Esther Perel, people seek partners who not only offer love and stability but also contribute to their self-actualisation, fulfilment and happiness. In my six years of working with couples, I’ve observed a widespread desire to maintain passion in long-term relationships . Couples strive for deeper emotional connections, personal growth and erotic fulfilment - qualities that were often absent in the long-standing relationships of previous generations.

The traditional model of monogamy is being reconsidered in a society where women are no longer solely financially dependent on men, the sexual revolution has expanded our exploration of sexual desires, and an increasing focus on personal development and therapy has made people more attuned to their authentic needs and desires. Studies suggest that around 4-5 per cent of the US population engage in ethically non-monogamous relationships , with Millennials and Gen Z leading the redefinition of societal norms around sexuality and relationships. Though specific data for New Zealan.