rule 34 2019 animal genitalia anthro balls black body black fur black hair black nose canid canine canis chest tuft digital media artwork fully sheathed fur grey body grey fur hair hands behind head hi res looking at viewer male male only mammal muscular muscular male nude oscuro farkas patrikthe pecs penis penis tip pinup pose purple eyes purple hair sheath simple background smile solo standing tuft white body white fur wolf 3429125