For a therapist, look for someone who is trained in Cognitive Behavioral Therapy and has experience with sexual health issues, you can find assistance through sex addiction anonymous websites/support group as well as zocdoc depending on state/country. When setting up the meeting put it blandly, you want help working through a fixation and identifying ways to manage the behavioral aspects stemming from the fixation. Fetishes are nothing to be ashamed of as everyone has one, the goal is managing it in a healthy way, so as not to cause harm to yourself and others through behaviors that may manifest from an uncontrolled fetish.