I don’t know what your are thinking, but this is what I am talking about 😉

The Vervet monkey, a native of Africa does have blue balls. You can click on this Wikipedia link for more details.

I have mixed feelings about caged animals. One part of me feels sorry for them and that they should be in the wild where they belong, then the hungry part of me that wants to know so much is glad to see them in the zoo where I get to know about them. A difficult feeling to reconcile.