rule 34 animal genitalia animal penis anthro balls black body black goo bodily fluids brown body brown fur canid canine canine penis canis changed video game cum cum on penis digital media artwork fox fur genital fluids genitals goo disambiguation goo creature goo transformation hair kemono looking pleasured male mammal nipples nude open mouth pawpads paws penis rubber shiratzu smile solo tongue tongue out transformation vex video games 5395945