I believe it's the same thing as poly-fi, but prescriptive poly. One female and one male relationship. It's like, baby steps into Poly without actually saying you are poly.
I had a friend who was gay but found it easier to say he was bi. Kind of the same thing. You aren't poly, you aren't interested in open relationships, you just like boys and girls, so you want A girl to date and A boy to date. Keeping both relationships separate.
Me: Late 30s pansexual poly.
DH: My husband of 19 yrs and father of 3 teen girls.
DC: LDR of +4 year