There is Relationship Anarchy, which is a dating philosophy that (as the name implies) views dating and relationships to be outside of the realm of definitions or rules. While others might define the activities of a relationship anarchist as being polyamorous, monogamous, or otherwise, those who practice relationship anarchy resist labeling their activities at all viewing that labeling as inherently relative and defined by social pressures. A relationship anarchist may or may not tell their partners about their other relationships, viewing each as existing as in independent entity.
The Frisky, “Open Your Mind: Non-Monogamous Dating Styles Explained”
