[bluefirebrand]

See, you can say that but if it's treated as a one time thing and actually stays a one time thing, then probably the two people in the couple aren't going to go around calling their relationship "non-monogamous"

[kyletns]

Doesn't really matter what they call it - that's non-monogamy (edit: or cheating)

[mystified5016]

> 21% of Americans have experimented with consensual non-monogamy at some point in their lives

"Try a threeway once" fits the billed description of "experimented with consensual non-monogamy" pretty exactly.

Whether the people involved continue to define their relationship as non-monogamous is irrelevant.