I have a skin picking compulsion too, nomaken. I even pick my skin when I'm talking to other people, without realising it. One time I was talking to a 30 year old mother of a child I was looking after, and I started picking a huge zit on the side of my neck. It popped and the pus that flew out of it went a little in her direction. Good thing it didn't hit her. She did give me an odd look, though.