 Unfortunately, Morbius retains enough of his imperfect human nature to be afflicted with hubris and a contempt for humanity.Not recognizing his own base primitive drives and limitations proves to be Morbius' downfall, as it had for the extinct Krell.While not stated explicitly in the film (although the basis for a deleted scene first included as an extra with the Criterion Collection's LaserDisc set and included with both the later 50th anniversary DVD and current Blu-ray releases), the novelization compared Altaira's ability to tame the tiger (until her sexual awakening with Commander Adams) to the medieval myth of a unicorn being tamable only by a virgin.