My partner and I have been in an open relationship now for almost 12 months whilst I'm away in another country. We have a strong and very beautiful connection which we both are working hard to maintain when apart. We have great communication and a set of "rules" about who we see outside our relationship and recently it was discussed about sleeping with friends. My partner has expressed his desire to have a threesome with two people we both know who have shown an interest in him. As we haven't yet shared a threesome together my initial reaction was that I wouldn't feel comfortable with him experiencing that without me but after sleeping on it, I'm now feeling like perhaps a platonic threesome with friends isn't so threatening? We do have a rule that we are not intimate with friends but I also don't want to limit his experiences and opportunities to feel adored in this way? Has anyone had experience in this and how should I navigate??