Sexual orientation may be defined as the direction of a person’s sexual attraction. A person may be disposed to experience sexual attraction to individuals of the opposite sex (heterosexual or straight), to individuals of both sexes (bisexual or bi), or to individuals of the same sex (homosexual or gay or lesbian). Androphylia is a term to describe the disposition to be attracted to men; bisexuality to describe the disposition to be attracted to both sexes; and gynephilia to describe the disposition to be attracted to women. Of note: the presence of homosexuality is higher among males; the presence of bisexuality is higher among females. (LeVay, Simon and Janice Baldwin. Human Sexuality. p 166-180. MA: Sinauer Associates, Inc., Third Edition, 2009.)

Homosexual males: the anterior commissure is larger (than in heterosexual males) and is about the size of that in the brains of heterosexual females. (Baron-Cohen, Simon, Dr. The Essential Difference: The Truth About the Male and Female Brain.p 111. NY: Basic Books, 2003.)

Contributors to the development of homosexuality may include: Direct alteration of hormones during fetal development, use of drugs that impact androgens (e.g., Depo-Provera, diazepam, marijuana), maternal severe emotional stress (stress hormones may cross the placenta and interfere with testosterone production in the baby), immune reaction against chemicals necessary for sexual differentiation. (Wilson, Glenn. The Great Sex Divide. p 78-80. England: Peter Owen Publishers, 1989.)

Most straight males are very uncomfortable with the idea of homosexuality, no matter how liberated they maybe in their thinking. Females seem to be far less threatened by homosexual contact. (Goldberg, Herb, PhD. The Hazards of Being Male. p 24. NY: Nash Publishing, 1976.)

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