I heard that humans jack off all day. Its true. This gorilla will give its opinion on matters, be it the interior decorating of its enclosure or males they keep trying to convince her to become the mate of. They actually showed her videos of them but she would have none of it and thought they were jerks. She called one a toilet. You can not train a nonsapient to improvise like that. http://www.koko.org/world/ If keepers are faking, they are doing a damn good job of it.