Rule 34 Dev - anthro ball_gag balls bdsm bodily_fluids bound duo feet forced forced_partners frottage gag genitals green_eyes heart_symbol kneeling male male/male nude penile penis sex sweat senshion sega sonic_the_hedgehog_(series) knuckles_the_echidna sonic_the_hedgehog echidna eulipotyphlan hedgehog mammal monotreme absurd_res hi_res|21423233125