Given our increasingly virtual and global lives, we are likely to have more friends than when we occupied only ‘real life’ communities. A teacher who grew up in a Devon hamlet tells me: ‘At 18, I had one friend. At 28, I have 1,093, according to Facebook.’ Some of these relationships may be rather vague, yet when I count the people I consider close friends, I come up with 30. We change jobs more than we used to, have more sexual partners, travel more, and with these opportunities our ‘friendship stats’ have massively inflated.