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How easy should we take love? Does love call for exclusivity? Romantic non-exclusivity is widespread. One form thereof is the attempt to combine two or more loving relationships like modules that have nothing to do with each other. Bernard Schlink's short story «The night in Baden-Baden» beautifully exemplifies this modular kind of love. My main claim is that this form of romantic non-exclusivity amounts to betrayal and is therefore unethical. I argue for this claim on the basis of a dialogical understanding of love.