rule 34 ambiguous penetration anthro blush bodily fluids bound breasts canid canine canis collar cuff restraint daigaijin domestic duo female female penetrated fur greyscale hair hi res male malefemale male penetrating male penetrating female mammal monochrome mouse murid murine navel nipples nude open mouth penetration pregnant restraints rodent sex spiked collar spikes sweat tail tongue tongue out 7347994