Back in my fifties, when I lived in Pune, India, I met a Polish gentleman living in the flat below mine. We met when our landlord, the only Zoroastrian I've ever met, invited the two of us to a 'get to know you' dinner. I learned the Polish dude had lived in the building for one month, to my two. He revealed he was struggling to adapt to solo living because he missed all his friends back home with whom he interacted face to face frequently. A month or two later...