There are many researches about cause and people’ attitude toward homosexuality. Firstly, we will show some researches about homosexuality.Homosexuality was seen as one kind of disease - sexual deviation and needed to cure (DSM – Diagnostic and Statistical Manual of Mental Disorders – US Mentally Group). In contrast, some researchers believe that homosexuality was an inherited abnormality which could not be cured simply because it was inherent. However, in the end of 1940, Kisey and his colleague composed this opinion by their research more than 450 homosexual histories. He was convinced that there was absolutely no evidence of inheritance. On the other hand, a handful of studies during the 1990s have claimed to offer evidence in favor of a biological or genetic cause for homosexuality such as: a study of brain structure by Simon LeVay, a study of twins by J. Michael Bailey and Rechard C. Pillard, and a study of “gene linkage” and “gene markers” by a team led by Dean H. Hamer. Some other researches based on upbringing, experience, and social environment, cultural actors finds the cause of homosexuality such as early childhood developmental factors, parental influence, and urbanization, the social organization of sexuality, demography and education (John O. G. Billy, Koray Tanfer, William R. Grady and Daniel H. Klepinger, “The Sexual Behavior of Men In the United States,” Family Planning Perspectives 25, no. 2 (March/April 1993): 59, Robert T. Michael, John H. Gagnon, Edward O. Laumann, and Gina Kolata, Sex in America: A Definitive Survey (Boston: Little, Brown and Co., 1994), 177–79.). Although there is much discussion about the cause of homosexuality, the origins of it are not
There are many researches about cause and people’ attitude toward homosexuality. Firstly, we will show some researches about homosexuality.Homosexuality was seen as one kind of disease - sexual deviation and needed to cure (DSM – Diagnostic and Statistical Manual of Mental Disorders – US Mentally Group). In contrast, some researchers believe that homosexuality was an inherited abnormality which could not be cured simply because it was inherent. However, in the end of 1940, Kisey and his colleague composed this opinion by their research more than 450 homosexual histories. He was convinced that there was absolutely no evidence of inheritance. On the other hand, a handful of studies during the 1990s have claimed to offer evidence in favor of a biological or genetic cause for homosexuality such as: a study of brain structure by Simon LeVay, a study of twins by J. Michael Bailey and Rechard C. Pillard, and a study of “gene linkage” and “gene markers” by a team led by Dean H. Hamer. Some other researches based on upbringing, experience, and social environment, cultural actors finds the cause of homosexuality such as early childhood developmental factors, parental influence, and urbanization, the social organization of sexuality, demography and education (John O. G. Billy, Koray Tanfer, William R. Grady and Daniel H. Klepinger, “The Sexual Behavior of Men In the United States,” Family Planning Perspectives 25, no. 2 (March/April 1993): 59, Robert T. Michael, John H. Gagnon, Edward O. Laumann, and Gina Kolata, Sex in America: A Definitive Survey (Boston: Little, Brown and Co., 1994), 177–79.). Although there is much discussion about the cause of homosexuality, the origins of it are not