Ah, sorry, now I see your point.
Yes, some of my wife's lovers were turned on because they were into the taboo of having another man's wife. Usually, this wasn't a problem; in fact, the 'competition' they were contending in made them more vigorous lovers, my wife enjoyed that.
A few times the man tried to belittle me with my wife; she quickly told them to knock it off. Not surprisingly, this happened more often when she was soloing than when I was in the room with them. One time, I remember, a guy was fucking her doggy style and he was saying weird shit to me about how I wasn't capable of satisfying her, etc. My wife pushed him away, put a robe on and told him to get out. I was proud of her for that.