Few males achieve any real freedom in their sexual relations even with their wives. Few males realise how badly inhibited they are on these matters.

The range of variation in the female far exceeds the range of variation in the male.

The male's difficulties in his sexual relations after marriage include a lack of facility, of ease, or of suavity in establishing rapport in a sexual situation.

If all persons with any trace of homosexual history, or those who were predominantly homosexual, were eliminated from the population today, there is no reason for believing that the incidence of the homosexual in the next generation would be materially reduced. The homosexual has been a significant part of human sexual activity since the dawn of history, primarily because it is an expression of capacities that are basic in the human animal.

If biologists so often forget the most universal of all biologic principles [variation], it is not surprising that men and women in general expect their fellows to think and behave according to the pattern that may fit the law-maker, or the imaginary ideals for which the legislation was fashioned, but which are ill-shaped for all real individuals who try to live under them.

Only the human mind invents categories and tries to force facts into separated pigeonholes.

There is a tendency to consider anything in human behavior that is unusual, not well known, or not well understood, as neurotic, psychopathic, immature, perverse, or the expression of some other sort of psychologic disturbance.