Cheating is not always an obvious intentional break of trust. Not only do people struggle to be honest with each other, they struggle to be honest with themselves. Relationships they convince themselves are innocent turn quickly to cheating under stress. Cheating never happens in a vacuum. There is a long progression in behaviors that at first are entirely justifiable and gradually less so. At what point is jealousy warranted? Parts of that process are can be free of ill-intent but based on moments of loneliness, separation, or other difficulties of life. It would be great if it were simple, binary, and always definable, but it isn't. And what if your partner encourages you to do something you consider cheating, or at least questionable in terms of boundary lines, but not only are they not jealous, they desire it? What are those emotional repercussions? To give an innocent, but common example, what if your partner pressures you to dress sexy so that guys gawk and hit on you? Does that lack of jealousy with all the trust it implies give a good feeling if you felt like that behavior suggested a breaking from intimacy?