I also have a strange thing that I don't know if it is asperger related. People laugh at me but it is fine because what I say sounds so completely stupid and impossible. I often mix up opposites. When I want to say up I say down, I mix up he and she, summer and winter, and my "favorite", sigh, yesterday and tomorrow.

I did that already tomorrow.
I will do that yesterday.

Meh, LOL.