Sex is, directly or indirectly, the most powerful weapon in the armoury of the Magician; and precisely because there is no moral guide, it is indescribably dangerous. I have given a great many hints, especially in , and —some of the cards are almost blatantly revealing; so I have been rapped rather severely over the knuckles for giving children matches for playthings. My excuse has been that they have already got the matches, that my explanations have been directed to add conscious precautions to the existing automatic safeguards.