I'm trying to remember why I'm not supposed to hurt myself. I always want to be able to commit to it when I'm in your office, but then when I'm back in the "real world" I can't convince myself of any good reason not to when I know it would make me feel so much better. Can't we work on making me feel better first, then take away my coping mechanism for those awful feelings later once I no longer need them?
It's so easy for you to say I shouldn't hurt myself when you're not the one who has to sit through this feeling and deny yourself the escape that you know would be so effective. Do you have any idea what this feeling feels like?
I already gave up drinking and starving myself. Why can't I do the one thing I have left that makes me feel better? Why are you trying to take this away from me? You say that it's cruelty towards myself, but if it provides some respite from this feeling then isn't it actually a kindness towards myself? You're asking me to make myself suffer.

Yes, I see all the flaws and distortions in this argument, and could argue the other side explaining exactly why it's important in the long term that I learn to manage these feelings rather than just finding a short term way to escape them that doesn't address the underlying problems. But I don't want to be reasonable. I don't want to write out a stupid thought record. I want to act like a petulant child and throw a tantrum and blame you for this.