I'm autistic. (Aspergers' and I really am unable to read subtle signals.
It doesn't worry me, but it seems to worry everyone else.

@Petter I don't think I am on the autism spectrum, but when it comes to reading women's signals regarding being physically attracted to me, I am probably about as clueless as you. They would have to either say something very direct or make a very clear physical move regarding me before I would ever pick up on them being attracted and interested in becoming physical with me. And that is not likely to happen very easily in my very traditional, conservative area I live in.