When the excessively shy force themselves to be forward, they are frequently surprisingly unsubtle and overdirect and even rude: they have entered an extreme region beyond their normal personality, an area of social crime where gradations don't count; unavailable to them are the instincts and taboos that booming extroverts, who know the territory of self-advancement far better, can rely on.

U and I: A True Story (ed. Vintage, 2011) - ISBN: 9780307807502