I was curious if it's alright to add a show as well to one that I would pick is Vampire diaries even though katheriene was a douche when it came to dating them both. Elena and the brothers would have way better communication with each other than katheriene did with them. that show opened my eyes to polyamory which they kind of had on the show but then it went poof.
A movie that could have seriously had polyamory was unfaithful with Richard Gere, Oliver martinez and Diane lane they both had such a fiery passion for her and also at the same time they brought out different sides in her. It would have been way better then how it actually ended with Richard Gere killing Oliver Martinez worst ending ever.