A lot of treatments for phobias and anxiety disorders that are related to cognitive behavioral therapy are progressive exposure. You're allowing them to get into small incremental steps of forward action. This is why I think anyone who's going to try an ice bath, don't freeze to death, but start at 45 degrees and move your limbs around. And if you do it appropriately, you won't die and you will come out of there, you'll get that dopamine rush. Those two things need to be coupled in one's mind.