something similiar has happened to me. i told the guy i had had a bad experience with a polyamorous man in my past and that i didn't want to engage in something like that ever again. i told him i was monogamous and would like to engage only with monogamous men, even if it wasn't anything serious. he seemed to understand and we had a fling for a while. i already knew it wouldn't evolve into something serious, but than he flirted with another woman while we were still together. and he did it in front of me, as if i didn't exist. i got really upset. couldn't he wait until we were no longer together?? anyway, he said i was being unfair and he had done nothing wrong because we weren't serious and than he said "my last relationship was polyamorous. i made out with other women in front of my girlfriend and she didn't mind. she made out with other men in front of me and i didn't mind." than proceeded to tell me i was overreacting, i was too jealous, i was too feminist - to the point where i was anti-feminist (!!!).

i hope this motherfucker is dead and buried. he deceived me and never ever admitted he was dishonest. i feel disgusted when i think that i let this pos get inside me.