2018 anatomically_correct animal_genitalia animal_penis anthro ballbusting balls bat biting_lip blue_eyes breasts chest_tuft cock_and_ball_torture digital_media_(artwork) echidna female fur hemipenes knuckles_the_echidna male mammal monotreme multi_penis nude penis pregnant purple_eyes pussy red_fur rouge_the_bat simple_background sonic_(series) tuft yiffy1234