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- The only unnatural sex act is that which you cannot perform.
- There are some who have questioned the applicability of scientific methods to an investigation of human sexual behavior... as though the dietitian and biochemist were denied the right to analyze foods and the process of nutrition, because the cooking and proper serving of food may be rated a fine art, and because the eating of certain foods has been considered a matter for religious regulation.
- It would encourage clearer thinking on these matters if persons were not characterized as heterosexual or homosexual, but as individuals who have had certain amounts of heterosexual experience and certain amounts of homosexual experience. Instead of using these terms as substantives which stand for persons, or even as adjectives to describe persons, they may better be used to describe the nature of the overt sexual relations, or of the stimuli to which an individual erotically responds.
- We are recorders and reporters of the facts — not judges of the behavior we describe.