Epidemiological studies find a positive association between physical and sexual abuse, neglect, and witnessing violence in childhood and same-sex sexuality in adulthood.
Because the instrumental and non-instrumental probit effect estimates were very similar, with the instrumental variable estimates slightly larger, we conservatively calculated population attributable fraction of same-sex sexuality due to sexual abuse using effect estimates from conventional models. We estimated 9% of same-sex attraction, 21% of any lifetime same-sex sexual partnering, and 23% of homosexual or bisexual identity was due to childhood sexual abuse, assuming the conventional effect estimates are correct.
Nearly 1/4 of lgb identities are due to childhood rape