The object of this investigation was to compare Danish and Muslim men treated for premature ejaculation in the Department of Sexology, Rigshospitalet, Copenhagen. The investigation is a retrospective review from the period 1986-1989. The following variables were included in the investigation: Mode of referral, personal data, duration of sexual dysfunction, previous sexological/psychiatric treatment, methods of treatment and results of treatment. The material consists of 60 Danish and 32 Muslim men. The investigation reveals that the Muslim men predominantly receive individual therapy of brief duration. Fewer Muslims were instructed in sensuality training and fewer carry out stop-start-treatment. The Muslim men responded more poorly to treatment than the Danish men. The differences in the therapeutic methods and therapeutic results cannot be explained on the basis of the personal parameters and possible cultural obstacles to treatment are suggested. For example, the therapist must become familiar with taboos and beliefs in the Muslim culture. The referring instance should inform the patients about the therapeutic principles at the Department of Sexology and attempts must be made to motivate possible partners to participate in the treatment.