My therapist does disclose his feelings in therapy, much as pink's. My therapist also discloses information about himself and his life with therapeutic intent. That is part of the tradition in humanistic psychology. Such self disclosure is therapeutic and can help build the mutualistic alliance. I was burned many years ago by a frame change in therapy, and my current T and I discovered that is probably the root of why I demand self disclosure from him in therapy. I feel so lucky I have a T who could accommodate me on this. His self disclosure aids my healing, and I am enriched by it.