the point is that the "science" that alledgedly proved this was true was politcal and not scientific, just like Global Warming.
The "science" that is often cited is two studies. One was a study of twins where at least one was homosexual. Some twins were reared together, some apart. The person who published the study said it indicated a genetic element. Other scientists said his data indicate homosexuality is a flip of the coin.
The other study is one of cadavers in New York City. A medical examiner there noticed that the pineal gland in cadavers who had been gay was smaller/almost nonexistent. However, he drew no conclusions because his sample size was 9 cadavers. He only published this information to suggest someone ought to study this and see if there's anything to it.
And you know this how?