(原始内容存档于2022-10-26). Kinsey, Alfred Charles; Research, Institutefor Sex; Pomeroy, Wardell B. Sexual Behavior in the Human Female. Indiana University Press
(原始内容存档于2020-04-14). LeVay, Simon. Gay, Straight, and the Reason Why: The Science of Sexual Orientation. Oxford University Press. 2017 [2019-10-20]. ISBN 9780199752966
deliberate use of the sexual faculty, for whatever reason, outside of marriage is essentially contrary to its purpose". For here sexual pleasure is sought