This paper describes seven chromosomal and gonadal females with the adrenogenital syndrome who were born with a penis as a result of extreme fetal androgenization. Four of them were reared as girls and differentiated a female gender identity with tomboyism. The other three were reared as boys, differentiated a male gender identity, and performed sexually as men with women partners. Even though these men are by no means homosexual in the everyday meaning of the term, the sexual relation is homosexual on the criteria of chromosomal and gonadal sex. The prenatal hormonal environment as well as the social experience of the rearing have thus demonstrated a formula for creating the perfect female homosexual.