Sexual orientation is one of the four components of sexuality and is distinguished by an enduring emotional, romantic, sexual or affectionate attraction to individuals of a particular gender.
Sexual orientation is different from sexual behavior because it refers to feelings and self-concept.
Persons may or may not express their sexual orientation in their behaviors. How a particular sexual orientation develops in any individual is not well understood by scientists. Various theories have proposed differing sources for sexual orientation, including genetic or inborn hormonal factors and life experiences during early childhood. However, many scientists share the view that sexual orientation is shaped for most people at an early age through complex interactions of biological, psychological and social factors. Sexual orientation emerges for most people in early adolescence without any prior sexual experience.