Maybe that's my definition of a fuck buddy clashing with yours then, motdakasha.
If you're a poly, then I don't think you can really use the term fuck buddy, can you?
I mean, when you add Love, I mean real romantic Love, into the equation don't the relations move substantially higher than the concept of just a buddy you have sex with?
I've had what I'd term fuck buddies, and i've been in relationships with several ladies at the same time - all knowing about each other. Those ladies all meant something to me romantically, there was more of a connection there than just friendship.
I've probably only muddied the waters, but still..
For me, Fuck Buddy necessarily means the absence of romantic connections or Love.
I guess everyone is entitled to use the term as they see fit though, it's unlikely to be defined in the Encyclopedea Britanica any time soon, I should imagine.