Most people who feel they are male adopt male sex roles, and most females adopt female roles. But we know of the separate existence of sex roles by the non-uncommon dissociations of identity and role. And as accidents of socialization, they can be changed simply by altering the way we raise our children or by some other act of will. We shall see whether this is so or just ideological fantasy. The surface layer is 'sexual performance', how adequately you perform when you are with a suitable person in a suitable erotic setting.
Normal performance consists of arousal and orgasm.
And no, Homosexuality does not become heterosexuality. Neither heterosexuality nor homosexuality is a causative of any disease whatsoever. Being specific and not politically correct,I have to affirm scientifically that diseases are only caused by viruses and bacteria which of course can enter any unsterlized wound. Diseases are not caused by human's erotic relationships or their religious beliefs. It's just bigotry to keep insisting that white is actually black.