Yes, I am aware of the gripping the neck thread, but this is different, and yes, I do have a teacher. I can't figure out how one can possibly not use their thumb for all of the force to press the strings down when the bass is turned sideways and balanced on the hip. When I try to use my back/shoulders the bass just turns because it is being pulled without any support from behind. The only alternative apparent to me is using the thumb or turning the bass forward in front of me like a cello, thereby supporting he bass sufficiently for it to be pulled with the shoulders. Someone please explain.