The curious incident of the dog in the night time

"What things does Christopher hate and why?"
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Christopher dislikes a lot of things, such as being touched, having different foods touching each other at the plate, lies, and when things do not go exactly as planned.

The one thing he hates that is repeated most in the book however, is the color yellow. He believes if he counts four yellow cars in a row on his way to school, it’s a black day, and that means that it Is a really bad day and he can’t do anything or take any chances. This is not rational thinking, but in Christopher head it makes sense because he needs certain specific rules in his life to keep him calm.

Here’s a paragraph from chapter 131 p 105, where Christopher explains some of the reasons for why he hate yellow so much.

“4. Yellow Fever (which is a disease from tropical America and West Africa which causes a high fever, acute nephritis, jaundice and haemorrhages, and it is caused by a virus transmittedby the bite of a mosquito called Aëdes aegypti which used to be called Stegomyia fasciata; and nephritis is inflammationof the kidneys)

5. Yellow flowers (because I get hay fever from flower pollen, which is one of the three sorts of hay fever, and the others are from grass pollen and fungus pollen, and it makes me feel ill)

6. Sweetcorn (because it comes out in your poo and you don’t digest it so you are not really meant to eat it, like grass or leaves)”

Christopher always look for the logic in things, and he needs things to be in a certain order so that he feels in control of what is going on, and he knows what is going to happen. The background for most of the things that he hates, which are listed above, is that they are disturbing the perfect order in all things around him that he needs to keep him calm. Things has to be planned, he needs to know what is going to happen.

 I think his urge to understand things and know how things work is somehow his brains way to compensate for the lack of social skills, ability to feel empathy and read peoples feelings and facial expressions, apart from being one of symptoms of his autism.