rule 34 anthro armpit hair balls bench big balls bodily fluids body hair brown hair buckteeth erection fur genital fluids genitals grey body grey fur grin hair hand behind head hi res looking at viewer lovkuma male male only mammal murid murine musclegut muscular muscular anthro muscular male nude overweight overweight anthro overweight male penis precum pubes rat red eyes rodent sitting smile solo teeth vein veiny penis 4722724