“This sperma, coming from the imagination, is born in Amor Hereos. This means a kind of love in which a man may imagine a woman, or a woman a man, to perform the connubial act with the image created in the sphere of the mind. From this act results the expulsion of an ethereal fluid, impotent to generate a child, but capable of bringing larvae into existence. Such an imagination is the mother of a luxurious unchastity, which, if continued, renders man impotent and woman sterile, because much of the true creative and formative power is lost by the frequent exercise of such a morbid imagination...” Paracelsus, De Origine Morborum Invisibilium, Lib. III