rule 34 anthro balls brown balls brown body brown fur brown tail cheek tuft erection facial tuft fangs full length portrait fur genitals glistening glistening eyes gulonine head tuft hi res humanoid genitalia humanoid penis looking at viewer lying male male only mammal mustelid musteline navel nipples nude on back orange eyes penis portrait pupbii red penis signature simple background solo tan body tan fur tan tail tuft wolverine 6768113