Rule 34 Dev - animal_genitalia animal_penis anus ball ball_gag balls bdsm blush bondage bound canine_genitalia canine_penis chain collar erection feral gag gagged genitals knot leash male penis piercing quadruped sheath solo tennis_ball tennis_ball_gag aerosaur83 canid canine canis domestic_dog mammal 2020 absurd_res digital_media_(artwork) hi_res|13387188745