The history of medicine proves that in so far as man seeks to know himself and face his whole nature, he has become free from bewildered fear, despondent shame, or arrant hypocrisy. As long as sex is dealt with in the current confusion of ignorance and sophistication, denial and indulgence, suppression and stimulation, punishment and exploitation, secrecy and display, it will be associated with a duplicity and indecency that lead neither to intellectual honesty nor human dignity.

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.

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 heterosexuality or homosexuality of many individuals is not an all-or-none proposition.

Art alone develops weaklings, science alone, monsters. Somewhere, somehow, we must combine the two.

Cheese crumbs spread before a pair of copulating rats will distract the female but not the male.

The only unnatural sex act is that which you cannot perform.