One of the Blogs of the Month is a delightful blog called "Bonobo Handshake". It is an Australian woman working with Bonobo's in the Congo. The blog is lovely, the Bonobos so really cute and funny. It is a life's work worth supporting and following.
That these people are doing a great job with animals that are or may be soon endangered is not in doubt. Their love for the animals is obvious. Their training and intelligence will most likely save these animals from extinction, all of which is to be mightily applauded.
These are animals, not proto-humans. No matter how close their genetic make-up is to humans, no matter what they do like using tools and having sex for no real reason other than the pleasure of it. If the were proto-humans they would not be bonobos. The would have "evolved" into humans not bonobos. Whatever they do, while smart, will not develop into humankind. No matter how hard we wish for it. Not even in several million years.
Using human anologies for their care may not be the best thing for them, either.
Still, I am not a scientist, so what would I know?