Scientists do not know the exact cause of sexual orientation, but they theorize that it is caused by a complex interplay of genetic, hormonal, and environmental influences. Although no single theory on the cause of sexual orientation has yet gained widespread support, scientists favor biologically based theories. There is considerably more evidence supporting nonsocial, biological causes of sexual orientation than social ones, especially for males.
There is no substantive evidence which suggests parenting or early childhood experiences play a role with regard to sexual orientation. Across cultures, most people are heterosexual, with a minority of people having a homosexual or bisexual orientation. : 8 : 9–10 A person's sexual orientation can be anywhere on a continuum, from exclusive attraction to the opposite sex to exclusive attraction to the same sex. #GAY PORN STRAIGHT MEN OUTDOORS PROFESSIONAL#Ģ.3 Influences: professional organizations' statements.1.4 Relationships outside of orientation.1.3 Gender, transgender, cisgender, and conformance.1.2 Androphilia, gynephilia and other terms.1 Definitions and distinguishing from sexual identity and behavior.Sexual orientation is studied primarily within biology, neuroscience, and psychology (including sexology), but it is also a subject area in sociology, history (including social constructionist perspectives), and law.