When Other and I were looking for an apartment a few years ago, we knew we wanted a live-in super. But when we found a just-right apartment, it happened to come with not only a super but also a doorman. It took me a while to cotton to the idea of having a doorman. It violated my sense of privacy. I wasn’t used to having anyone know my comings and goings. And—this may sound churlish—sometimes I don’t feel like saying hello to anyone. There was a little identity crisis going on too: I’ve always had a little bit of contempt for rich people, and now my living circumstances seemed to make me one of them. But perhaps the biggest dilemma was how to interact with the doorman. He provided services—rushing to open the door, push the elevator button, grab a bag from my arms—that looked like caring but that he was paid to perform. It was confusing. It felt a little bit like love, but it was just a guy doing his job. And I couldn't reciprocate by, say, grabbing his bag. The confusi...