Rule 34 Dev - 1boy 2016 animal_genitalia animal_penis anthro asylum balls beanie bottomless canine canine_penis clenched_teeth closed_eyes clothed clothing erection greyscale grrrwolf hat knot lwrottie lying male male_only mammal monochrome on_back pencil_(artwork) penis penis_milking signature solo straining straitjacket struggling teeth traditional_media_(artwork)|2436149584