This is the last stage of Freud's psychosexual theory of personality development and begins in puberty. It is a time of adolescent sexual experimentation, the successful resolution of which is settling down in a loving one-to-one relationship with another person in our 20's. Sexual instinct is directed to heterosexual pleasure, rather than self pleasure like during the phallic stage. For Freud, the proper outlet of the sexual instinct in adults was through heterosexual intercourse. Fixation and conflict may prevent this with the consequence that sexual perversions may develop. For example, fixation at the oral stage may result in a person gaining sexual pleasure primarily from kissing and oral sex, rather than sexual intercourse.