Nobody could cheat secretly. They'd still cheat. The framing story in my favourite comic issue "Winter's Tale" has more or less exactly this be scenario, "I was going to tell you" he says. The people in Winter's Tale and most of that run (Gaiman's Golden Age of Miracleman) live in a utopia, but they're still people and they still cheat and lie. The larger point of the story is that children won't fill a hole in your heart.
Nobody could cheat secretly. They'd still cheat. The framing story in my favourite comic issue "Winter's Tale" has more or less exactly this be scenario, "I was going to tell you" he says. The people in Winter's Tale and most of that run (Gaiman's Golden Age of Miracleman) live in a utopia, but they're still people and they still cheat and lie. The larger point of the story is that children won't fill a hole in your heart.