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
Sex differences in humans verbal fluency and male advantage in physical power fade after age 25 in an asymmetric manner. She pointed out to several other studies on humans and other primates showing a levelling of sex differences in sociability and physical strength. Males and females might indeed have different timings of maturation of physical and verbal systems: according to McGuinness and Pribram (1978) during the first two years of life talking and walking rarely occur simultaneously, which suggests that these two abilities compete for the same set of neural connections, or that one type of neural organization inhibits the other. This coincides with