Male Homosexuality by Richard Friedman is an analysis of case studies which begins with the hypothesis that gender roles are social yet homosexuality is a genetic fulfillment of the variations, including cross-dressing, that depicts their interaction in a gender differentiated influence on character traits. To say it discusses levels of anger, fear, and aggression is not enough. Friedman by describing psycho social disorders that relate to homosexuality takes an in depth look at guilt, shame, innocence, sado-masochism, paranoia, phobia, homophobia, and the general description of how homosexual boys leave the world of rough and tumble play simply because they are not good at competing aggressively.
Friedman takes a look at same gender and cross gender twins refering to a brothers reaching out to their sisters to achieve an identity, while the female sees her brother as her sister and an extension of her own self perceptions. That gender fulfillment is carried out by homoerotic fantasies has specific implications for those whose sexuality is actually bisexual, with differing sexual orientations at different times in their lives.
Friedman praises freud in capturing the anal oedipal complex of young boys beginning to have endearing relations with other males while fantasizing about the sodomy they experienced with their parents. He goes on to conclude that the orientation of non gender specific roles in homosexuals is the genetic fulfillment of this psycho social homosexual orientation.