We have all seen it on vacation or while strolling through the city centers of our home towns: couples sitting at a table in a café or restaurant not talking to each other or – even worse – both looking at their smartphones. I know that there might be plenty of reasons why two people do not want to talk to each other at a specific moment – but since I have observed the situation of couples-not-talking-to-each-other during last week’s vacation a lot and also multiple times for the same couple I doubt that the reasons I had in mind are valid. There rather must be a general reason or problem why two people in a relationship simply cannot come up with anything to say to each other anymore.