Lukas Klaschinski: Almost everyone knows them - either from their circle of friends and acquaintances or from their own experience: on-off relationships. Sometimes you're together, sometimes not, and most of the time you're neither really together in the "on phases" nor really apart in the "off phases". Incidentally, these relationships are called "on-off relationships" because, like a light switch, they are sometimes on, then off, then on again - and so on. But what is actually behind this relationship dynamic?

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