I do that for my husband. He moves his shoulders and makes little whimper sounds. I try that and he ignores me. I have to verbally ask his to scratch my back. After 18 years I would hope that he would understand by now. But no. I can rub his back for hours and it never seems to be enough. He goes scratch, scratch for me and is done. Oy! It is so unfair and unbalenced.