Critique of studies[ edit ] The studies performed in order to find the origin of sexual orientation have been criticized for being too limited in scope, mostly for focusing only on heterosexuality and homosexuality as two diametrically opposite poles with no orientation in between. It has been characterized as "mostly straight". Consequently, anyone who differs from the normalcy of heterosexuality is deemed deviant or abhorrent. For women, a change occurred in 1. The study's senior researcher said that women's sexual desire is less rigidly directed toward a particular sex, as compared with men's, and it is more changeable over time. Was it even his business? Data were collected on respondents' social and demographic characteristics, relationship status and duration, cohabitation status, partner's age, contraception use, expectations about sexual exclusivity, sexual partners in the previous year, actual and ideal frequencies of sex and levels of physical pleasure and emotional satisfaction in their relationships. Diamond concluded that "although sexual attractions appear fairly stable, sexual identities and behaviors are more fluid. I know sexuality is a spectrum and all these terms are just our attempts to linguistically bind emotions, but the term "heterosexual" did not feel right. For example, people may state different sexual orientations depending on whether their immediate social environment is public or private. He could tell I was in my head and suggested we go for a walk. Kinsey Reports Intimate heterosexual couple At the beginning of the 20th century, early theoretical discussions in the field of psychoanalysis posited original bisexuality in human psychological development. Sexual orientation change efforts Sexual orientation change efforts are methods that aim to change sexual orientation, used to try to convert homosexual and bisexual people to heterosexuality. Females with boyfriends were more likely than others to be currently sexually active. It's been about half a year now and most of my friends know that I am bisexual. Human mating strategies An intimate heterosexual couple Since the s and s, a large body of research has provided evidence and analysis of the extent to which heterosexuality and homosexuality are socially organized and historically changing.