I knew I was abnormal with clothes around 8 years old. I remember clothes bothering me at a much younger age, but around 8 was when I realized I was weird for despising clothes shopping because it hurt so much to try on clothes. None of the other kids complained about how much it hurt and my sister had no issues wearing all types of clothing.

I knew I was abnormal with McDonalds food around 10 years old. I couldn't understand why all the other kids loved the place when it made me projectile vomit after each time I ate one of their burgers. That took a few years to figure out the corelation. Only Corn Dogs gave me the same reaction and it took me until I was 26 years old to find out I had food allergies.

I knew I was abnormal with sports around 12 years old. I would play a sport for 5 minutes and then get so tired and slow the coach would pull me and trap me on the bench. Prior to that 5 minutes, I was a normal to skilled player. After I hit the 5 minute mark, I was a turtle and incompetant.

It was in High School that I realized that I was abnormal in getting a Migraine each time the note High C occured. I would get a Migraine even if I was the singer who hit the note.

It was in College that I realized that I was abnormal in my attempts to climb stairs. In high school, I was one of the fattest kids so I thought it was that that made stairs so difficult for me. However, in college men and women twice my weight (they were ~300 lbs without much muscle) would fly up and down the stairs without getting out of breath. One flight and I thought I would pass out.

It was in the work place when I had no choice but to start wearing Sunglasses at my desk because otherwise I only saw a bright white screen with no text on my Computer without them.

Note: I have SPD, Food Allergies, and Hypokalemic Periodic Paralysis. Not all my abnormalities are SPD related. The Periodic Paralysis affects my muscles a lot.

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It is a combination of noticing that something bothers you and then noticing that it doesn't bother others.

Autistics are probably more vulnerable to SPD because they notice less often when something bothers other people.