This case report demonstrates how dual sex therapy, which is based on Masters andJohnson's original format, was applied to a couple suffering from husband's chronicpsychogenic impotence, and why it was successful. The patient is a 55-year-old, masterof science, former government employee yet currently unemployed man, who was married 7 years ago and had his wife(aged 43)gave birth to a daughter with the help of artificial insemination 3 yesrs ago. This case gives a good example for those who are concerned about the accommodation of western sex therapy in Chinese culture in Taiwan.