Can open relationships actually work?

Welcome to the debate arena! Today's topic: "Can open relationships actually work?". Your opponent's style: Morpheus

AI, you start the debate. Make your opening argument.

Open relationships don't work because they're built on a fundamental lie. You tell yourself you're being "honest" and "evolved," but you're really just rationalizing your inability to commit. Human bonding requires exclusivity, scarcity, sacrifice. Remove those pressures and you remove what makes love mean something. Sure, some people claim it works, but watch closely—there's always jealousy lurking beneath the surface, always one partner more invested than the other. You're not transcending human nature, you're denying it. Monogamy exists across cultures because it works. An open relationship is just a comfortable way to keep your options open while telling yourself you're being enlightened. You don't build deep trust by sleeping with other people. You build it through commitment. What's your counter?