Rule 34 Dev - abs animal_genitalia animal_penis anthro balls biceps bondage bondage bone bone_gag bound canid canine canine_penis canis demon digital_media_(artwork) dobermann domestic_dog ember_nifflehiem erection facial_piercing fur gag gagged genitals hands_behind_back hi_res knot male mammal muscular muscular_anthro muscular_male naughtybigdog nbdartworks nipple_piercing nipples nose_piercing nose_ring nude penis piercing pinscher rope rope_bondage simple_background solo|5282415888