Wherever he was, whatever he was doing, he found himself suddenly accosted by some kind of synaesthetic fixation with the woman: hearing the colour of her hair in the mosque, smelling the touch of her hand on the tube, tasting her smile while innocently walking the streets on his way to work; and this in turn led to a knowledge of every public convenience in London, led to the kind of masturbation that even a fifteen-year-old boy living in Shetlands might find excessive.