A few readers attest to that. The first makes a key distinction:
I’ve been in a poly relationship since around 2010, and I think it’s important to make clear that being poly and being in an open relationship are not exactly the same. Being from the Midwest, I had no clue what poly was until I moved to Seattle and became a member of the Center For Sex Positive Culture. So, while I am not a perfect expert, I do want to clear up some stuff.
An open relationship can generally be considered as something between a couple (two committed adults in a relationship) who are willing or looking to add someone else in for a short term period—a threesome, foursome, one-night stand, swinging, etc.
A polyamorous relationship might be an open relationship. But a poly relationship might also be every bit as focused as a monoamorous relationship, except between three committed people, or four, or more.