I sat in on a class in college (in which I was eventually kicked out) because a speech teacher teaching a CORE class in my major (not speech) told everyone in class there was scientific proof of the propensity of homosexual orientation. Supposedly, some ideological 'scientists' autopsied the brains of aborted fetuses and discovered a chemical on the brains of some fetuses. This was scientific proof of the propensity of homosexual behavior. I asked the college professor if the scientists shoved the fetus back into their birth canal and waited the remaining gestation period, and longer, to determine the sexual orientation. I was kicked out of class.