For most people, their twenties represent some kind of high-water mark of gregariousness, as they embark on adventures in the real world, find a career, lead active and exciting social lives, fall in love, splash around in sex and drugs. I was aware of this going on around me. I knew about the nightclubs and the gallery openings, the gigs and the demonstrations; I noted the hangovers, the same clothes worn to work on consecutive days, the kisses on the tube and the tears in the canteen, but I observed it all as if through reinforced glass.