"When it comes to girls (and in Colin's case, it so often did), everyone has a type. Colin Singleton's type was not physical but linguistic: he liked Katherines. And not Katies or Kats or Kitties or Cathys or Rynns or Trinas or Kays or Kates or, god forbid, Catherines. K-A-T-H-E-R-I-N-E. He had dated 19 girls. All of them had been named Katherine. And all of them- every single solitary one- had dumped him."

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People thought he was a glutton for punishment, that he liked getting dumped. But it wasn't like that. He could just never see anything coming, and as he lay on the solid, uneven ground with Hassan pressing too hard on his forehead, Colin Singleton's distance from his glasses made him realize the problem: myopia. He was nearsighted. The future lay before him, inevitable but invisible.

— John Green