Being alone is the most awful thing in the world. You visit your museums and cultivate your interests and remind yourself how lucky you are not to be one of those spindly Sudanese children with flies beading their mouths. You make out To Do lists - reorganise linen cupboard, learn two sonnets. You dole out little treats to yourself - slices of ice-cream cake, concerts at Wigmore Hall. And then, every once in a while, you wake up and gaze out of the window at another bloody daybreak, and think, . People like Sheba think that they know what it's like to be lonely. They cast their minds back to the time they broke up with a boyfriend in 1975 and endured a whole month before meeting someone new. Or the week they spent in a Bavarian steel town when they were fifteen years old, visiting their greasy-haired German pen pal and discovering that her hand-writing was the best thing about her. But about the drip drip of long-haul, no-end-in-sight solitude, they know nothing. They don't know what it is to construct an entire weekend around a visit to the laundrette. Or to sit in a darkened flat on Halloween night, because you can't bear to expose your bleak evening to a crowd of jeering trick-or-treaters. Or to have the librarian smile pityingly and say, 'Goodness, you're a quick reader!' when you bring back seven books, read from cover to cover, a week after taking them out. They don't know what it is to be so chronically untouched that the accidental brush of a bus conductor's hand on your shoulder sends a jolt of longing straight to your groin. I have sat on park benches and trains and schoolroom chairs, feeling the great store of unused, objectless love sitting in my belly like a stone until I was sure I would cry out and fall, flailing, to the ground. About all of this, Sheba and her like have no clue.