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

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

We are the recorders and reporters of facts - not the judges of the behaviors we describe.

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

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.

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.

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.