Most people with frotteurism never seek professional help, but people with the disorder may come into the mental health system as a result of a court order. The diagnosis is established in an interview between the person accused of frotteurism and the mental health professional (a psychiatrist or a psychologist , for example). In the interview, the individual acknowledges that touching others is a preferred or exclusive means of sexual gratification. Because this acknowledgment can bring criminal charges, the disorder is underdiagnosed and its prevalence is largely unknown. In some cases, other people besides the accused may be interviewed, including observers or the victim.