Is this considered disrespectful because there's bound to be temptation especially if their "friend" is attractive and they have a really "close" connection with each other? Would you just stay out of the way, or would you share your discomfort about this? And when they're hanging out, it's one-on-one (eating out, hiking), even hanging out at each other's places. Do you think that this could be innocent? What are the boundaries to be put on friendships between the opposite sex? Like what would seem suspicious? Or innocent? And does it change if you're in a serious relationship (boyfriend and girlfriend) and/or married?