A large body of research suggests that homosexuality is a learned behavior. Evidence for this comes from several sources:
1. No one has found a single genetic, hormonal or chemical difference between homosexuals and heterosexuals (Marmor J, ed., Homosexuals Behavior: A Modern Reappraisal, Basic Books)
2. Those raised in non-religious homes are 4.5 times more likely to choose a homosexual lifestyle than those raised in religious homes (Institute for the Scientific Investigation of Sexuality, What Causes Homosexuality and Can It Be Cured?)
3. A number of homosexuals do change their behavior. If homosexuality were innate, change would not be possible. The rate, according to Stanton and Yarhouse, ranges from 33% to 60%. Most psychologists still believe homosexuality is learned, even those who endorse their behavior (examples include Rado, Bierber, Socarides, Kinsey, Hooker, Szaz, Marmor and Masters and Johnson).