Unless you're polyamorous, a great deal of weight is placed up the notion of faithfulness. The underling notion is truth of course. A polyamorous individual is being as truthful and one who is monogamous. Things get a bit more complicated when a supposedly monogamous individual cheats. The reverse is not true of polyamory. Few polyamorous individuals who ware secretly monogamous will ever be upbraided for the feeling that they only want to be with their legal partner in life, although as strange as it may sound there are covens of gay, straight and trans people who demand a certain allegiance to the cause. The Sullivanian analytic movement argued for promiscuity as cure for possessiveness. The underlying notion was a critique of the oedipal triangle which also came under scrutiny by French analysts like Deleuze famous for his Anti-Oedipus tome. The comic possibilities of perverse or not so perverse arrangements are legion. Remember Cage Aux Folles?
read "Chicago" by Francis Levy, The East Hampton Star
