Rule 34 Dev - 2015 all_fours anal anal_sex animal_genitalia anthro anthro_on_feral balls bite canine canine_penis closed_eyes doggy_style duo erection fennec feral fox from_behind gradient_background interspecies knot knotting male mammal open_mouth penetration penis sex simple_background talynwolf wagnermutt wolf yaoi zoophilia|2088658480