Flooding
A person suffers if they try to avoid there fear, flooding facing full on. The bobby wants to get away, sweats fells sick etc but the body can’t maintain this and the hr will start to slow and person calms with the fear still there. They form a new positive association with the fear.
Therapy
Stop or reverse phobia. Flooding
Systematic desensitisation
More gradually
Implosion therapy
Imagines there worst fear - like flooding.