EDITOR'S NOTE
Dr. Long's description of "Free Time" should be thoroughly understood by the readers of this book. Since it is practically impossible to conduct exact scientific tests under strict control (the reason for which can be readily understood) there is much difference of opinion among physicians and sexologists on this subject.
Some say there is no such thing as "Free Time." Others agree with Dr. Long that there is a period of "Free Time." Still a third group take the conservative viewpoint that further proof is necessary. The publishers offer this explanation as a necessary comment.