Boy, you really appreciate those special times when they are loving a good scratch or head rub. I do the same thing as you with my thumb pressed on the head and scritch with the fingers. Lola is the subtle hinter for scratches. When I change her papers she moves to the top of her open door and sits patiently. If that’s not doing it she moves down closer and sits on a flat cup holder and waits for me to stop with the papers to touch her. Here, she could easily climb on my back but she doesn’t. Sometimes she will grab my shirt to get my attention. Once in a while she will move down to the opening of the door to keep me from reaching in. They’re so smart! As long as I avoid those new pins she enjoys a good scratch or rub. If it’s a good scratch she’ll gift you with her perfume.