Polyfuckery to me, is a derogatory term. Used for someone who is lying to others, or themselves, in order to obtain sexual pleasures as a primary. They are hiding behind the idea of 'many loves' when they have no intention, or ability to love more then one.
You can be a swinger, open, or as my husband terms himself, 'poly-friendly'. none of which are derogatory terms. Polysexual sounds like a good term as well.
My husband has never actually been in love with 2 women at once. He is open to the concept though. He is also open to other aspects, of other alternative lifestyles.
He doesnt lie, nor hide behind a poly label,..just tells people he is poly-friendly.