A long list of famous persons, men and women who made major contributions to society, are identified as having been homosexuals and lesbians. This is a worthwhile argument if someone were trying to maintain that all homosexuals were totally depraved and unable to contribute anything to society. That is certainly not the issue. Many people with a homosexual orientation are outstanding in various fields, and there is even the possibility that they, because they are limited in some areas, excel in others. But this does not prove that homosexuality is normal and natural.
Animals do it.
The logic behind this often stated belief is that, if it occurs in nature, it is indeed natural. Broad statements are made as to the occurrence of homosexual behavior among animals of all types up to and including primates. Efforts have been made to induce homosexual behavior in animals through surgical and hormonal treatments. The best known of these involved the castration of a male rat at the time of birth with the administration of sex hormones in adulthood. Such treatment did result in sex-role reversals in the adult rats.