For me the ability to be touched is dependant on whether I'm dissociating or having a flashback, which is similar though the picture in my head is of something terrible usually when I'm flashing back where there's just a void when I've dissociated. If in having a flashback my therapist makes sure to stand very clear of me add I guess I get very upset and ask her not to touch me and to let me out of the room. However , and I wrote a post on this you should look at as well, if I've begun to space out, she will ask me if I'm still there with her, and if I can do ___. It could be anything from standing up to looking around the room and finding something to focus onto clapping my hands or posing my feet into the floor.