I sensed I wasn't like everyone else before I was able to put the thought into words. Since the first grade, all the other kids just seemed stronger and quicker, and able to do everything more easily than me. In the second grade they started asking me questions I didn't know the answer to, such as "why do you walk on your tiptoes", and "why are you echoing us". By the third grade, I had the sense that there was some kind of communication going on between everyone else that I could not perceive (I had no idea what, so I imagined things like invisible marks on people that told them how to treat each other). Around that time things started getting really bad, so the feeling that I was somehow very different from everyone else became absolute certainty.