rule 34 2023 5 fingers animal genitalia animal penis anthro artist logo balls beard bondage gear canid canine canis digital drawing artwork digital media artwork digitigrade domestic duo equid equine equine genitalia equine penis facial hair fingers fur genitals hair hand on penis hi res high angle view hooves knot leash logo looking at viewer male malemale mammal muscular muscular anthro muscular male navel nerton nipples penis simple background standing tail 8030409