Most homosexual orientation develops during gestation. Patterns tend to be firmly in place by age 5. Discusses lack of success of change therapies (e.g., push bisexuals to confine behaviors to opposite sex only, or enforce celibacy, or push the individuals to attempt suicide). (Pease, Barbara and Allan. Why Men Don’t Listen and Women Can’t Read Maps. p 171-186. NY:Broadway Books, 1998.)
The trauma of growing up gay in a world that is run primarily by straight men is deeply wounding in a unique and profound way. Straight men have other issues and struggles that are no less wounding, but they are quite different from those of a gay man. ( Downs, Alan, PhD. The Velvet Rage. Overcoming the Pain of Growing up Gay in a Straight Man’s World. p 5-6. NY:Da Capo Press, 2005. 2006.)
“Nobody in science now believes that sexual orientation is caused by events in adolescence ... Homosexuality is an early, probably prenatal, and irreversible preference.” ―Author and Geneticist Matt Ridley. Summary of 14 studies that show brain and body differences between heterosexual and homosexual individuals (e.g., inner ear, finger lengths, finger ridges, startle reflex, maternal side, etc.). Ontario Consultants on Religious Tolerance. Religious Tolerance.org http://www.religioustolerance.org/hom_caus4.htm
Refer to Sexual Orientation and the Brain for additional information.