My DD8 is also very literal and there is no ASD involvement. She also follows rules to the letter of the law. I am also a very literal person, my motto often times is: Say what you mean and mean what you say. So I understand where she is coming from although it can create misunderstandings/misperceptions about things. This is an area that we both struggle with knowing when and what to relax and laugh over. Working on projects with two literal people is not much fun! LOL