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In 1886, psychologists Richard von Krafft-Ebing listed sexual perversions as "sex-related mental issues. " Sigmund Freud defined homosexuality as "a conflicted psychosexual advancement. " Other reports imply that the reason behind homosexuality is not a single factor but a mix of inborn factors and environmental affects. There are a number of factors associated with the genetic basis of sexual orientation, including the presence of older brothers. Having older brothers in the family considerably increases the chance of homosexuality. Each older brother has a 33% boom in the prevalence of homosexuality. Additionally, older brothers are associated with a statistically enormous discount in weight at birth. These findings can't be explained by transformations in family history or schooling. Researchers speculate that the effect of older brothers is due to a mother's accumulation of antibodies to proteins expressed in the male brain. However, these antigenic proteins haven't been identified. In Japan, six-in-ten respondents say that homosexuality will be accepted.
04.01.2023
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