I think the Aspergers thing is massive in the equation.
It's a bit like if I need a loaf of bread, it has to be the Warburton's bread with blue or orange packaging, which has no vinegar in it. Most other bread has vinegar which is overpowering and makes me feel really ill. I can't consume vinegar at all so I inspect food packaging to make sure what I'm buying doesn't have any of if in the product.
I then go to the shop, shaking involuntary and twitching. If I get to the shop and they don't have any of the Warburton's orange or blue I get very distressed, feel like everything has gone wrong and then come back home. I then can't settle all day at all and feel it's all been ruined.