Never. Open relationships never work. Someone is gonna get jealous. Someone is gonna get more time with someone. Someone is gonna become malicious and drama filled. Someone could bring STIs or STDs into the relationship.
Overall someone is gonna get hurt or left behind. No open relationship works. If anything, those in open relationship are jokes in my opinion. I see three or more people being manipulated/humiliated to allow someone else the ability to hurt them publicly.
