I'm on the poly and nonmono subs for reasons.

There's lots of happy triads etc and fine, whatever. There's a concept of a "V" triad, which basically means one person is partnered with two others, but the two secondaries are not partnered with each other.

The V triads are composed of someone at the top, with either two men, a woman and man, or less often, two women as the secondaries. But you know what I have never ever seen posted, let alone celebrated, even on a place as open and tolerant as the poly sub? A V headed by a man with two women. none of the V relationships are headed by a man. There's no women I know that would be satisfied willingly sharing their man with another women, but there a plenty of women that believe that they deserve to be shared between two others.