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

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.

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

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

It is ordinarily said that criminal law is designed to protect property and to protect persons, and if society's only interest in controlling sex behavior were to protect persons, then the criminal codes concerned with assault and battery should provide adequate protection. The fact that there is a body of sex laws which is apart from the laws protecting persons is evidence of their distinct function, namely that of protecting custom.

Males do not represent two discrete populations, heterosexual and homosexual. The world is not to be divided into sheeps and goats. Not all things are black nor all things white. It is a fundamental of taxonomy that nature rarely deals with discrete categories. Only the human mind invents categories and tries to force facts into separated pigeon-holes. The living world is a continuum in each and every one of its aspects. The sooner we learn this concerning human sexual behavior, the sooner we shall reach a sound understanding of the realities of sex.

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.