Stopping SI, in my experience, is not just a matter of having it be forbidden and then okay one stops - nor is it something that one can "just stop" doing. Having it be forbidden by some therapist would not stop it for me and would make it more present. It has been helpful to me to have a therapist (not the first one I see with whom I do not talk about it, but the second one) who will simply explore it with me. She has not commanded I stop, she has even said it is understandable, not desirable, but not alien or weird or wrong or so forth.