2 ms·This, a million times. The metro in Paris is good because upper middle class people take it.by thatfrenchguy 8y agoThis, a million times. The metro in Paris is good because upper middle class people take it.AlexB138 8y agoHow exactly did you come up with that direction for the causal relationship?geebee 8y agoJust so. But they also take it because it’s good