Like Bradley Pearson in , 'N', as he is called, uses quotation marks for such vulgarisms as 'sulks,' 'commuters' and 'worthwhile activities', as well as for phrases like 'too good to be true', 'the wrong end of the stick' and 'keep in touch.' The reader reflects that a cliché or approximation, wedged between two inverted commas, is still a cliché or approximation. Besides, you see how it would 'get on your nerves' if I were to 'go on' like this 'the whole time'...
Martin Amis