Rule 34 Dev - against_surface anal anthro anus big_butt butt collar duo face_in_ass facesitting fur glass grey_body grey_fur hair hands_on_legs hands_on_thighs male male/male on_glass oral pink_hair puffy_anus rimming sex sitting_on_another thick_thighs armus_(artist) armus skarrfox asinus canid canine donkey equid equine fox mammal guide_lines|16379389390