Rule 34 Dev - anthro anthro_on_anthro blush breath closed_eyes clothed clothing echidna footwear french_kissing gloves hedgehog hi_res kissing knuckles_the_echidna legwear lying male male_only mammal monotreme nude on_back on_top open_mouth quills r18 shoes socks sonic_(series) sonic_the_hedgehog sonknux spikes sweat tongue tongue_out video_games yaoi|3244556904