rule 34 absurd res ambiguous gender animal genitalia animal penis anthro ass athletic balls bench big penis blue body blue fur bondage bondage bound brown body brown fur canid canine canis domestic duo embarrassed equid equine equine genitalia equine penis fluffy fluffy tail frown fur genitals glistening glistening body green eyes hands behind back hands tied hi res humanoid imminent sex locker room long penis looking at another looking at partner looking up looking up at partner male malemale mammal mouth closed nervous nipples nude penis questionable consent rear view regret restrained restraints rope rope bondage sad scared sex sheath simple background tail vein veiny penis worried yellow background 7675396