If you could stop this fear by sticking a finger down your throat, would you do it?

This is what my therapist wants me to do. He wants me to induce vomiting because he feels that it's absolutely necessary, after having a good amount of CBT therapy under my belt, to vomit as the last "therapy" as a way to prove that, okay, I've done all this therapy, learned all this stuff, made all these changes to my negative thought patterns and behaviour.... now it's time to face my fear head on.