Scientists who believe that people become transsexuals because of social and psychological reasons point out that in the West, male-to-female transsexuals are twice as common as female-to-males, whereas in Taiwan it is the other way around.
主張社會心理因素的學者則舉出，在歐美國家，有關變性人的男女比例，男變性人為女變性人的兩倍以上，然而，台灣的數字卻是相反，男女比例為一比二。