Zoophilia of bestiality is partly caused by irrational speciesism and anthropocentrism. Because interspecies sex occurs in nature, and because humans "are" animals, supporters argue that zoosexual activity is not "unnatural" and is not intrinsically wrong. Research has proven that non-human animals can and do have sex for non-reproductive purposes (and for pleasure). In 2006, a Danish Animal Ethics Council report concluded that ethically performed zoosexual activity is capable of providing a positive experience for all participants, and that some non-human animals are sexually attracted to humans (for example, dolphins). Some zoophiles claim that they are not abusive towards animals: "In other
Moral status of animals in the ancient world attempt the creation of a taxonomical categorization and hierarchy of animals. Aristotle perceived some similarities between humans and other species and developed a sort of "psychological continuum", recognising that human and non-human animals differ only by degree in possessing certain temperaments. Nevertheless, he denied animals rationality and moral equality. "Plants are created for the sake of animals," he wrote, "and animals for the sake of men." Aristotle argued that humans were the “masters” in his created hierarchical structure based upon their rational powers. One of Aristotle's pupils, Theophrastus, argued against eating meat on the grounds that it robbed animals of