I think there are two criteria for being able to appreciate Eyes Wide Shut: 1) having been in a serious, long-term relationship and 2) realizing that the entire narrative is a dream. From the title to the fact that it was based on
Traumnovelle, literally Dream Novel, makes the entire film make a hell of a lot more sense, turning it from a slightly confusing film to a highly interesting meditation on desire, fidelity and opportunity. And the boobies are nice too.