The one I see used to tell me that what I said in response to her rather cliched "what are you feeling" sorts of questions, were not feelings. I could never get her to tell me what were feelings beyond Anger, Contempt, Fear, Disgust, Happiness, Sadness and Surprise - since none of those fit, I would end up quite frustrated with her and my attempts at explaining.
I resolved it by no longer playing that particular therapy game with her any more.