I have never done it, but I have certainly felt like it emotionally. I would love to curl up into a ball and have T put her arm around me to make me feel safe and comforted. However, that just isn't how therapy works with my T. I'm sure she would let me curl up into a ball if I really wanted to-- but without her putting a hand on my shoulder or doing something comforting it would end up making me feel disappointed or unsupported. So, for me, it just isn't the right thing to do in my therapy. But I can totally relate to the feeling!