What I'm wondering about is the "penis" and "scrotum" bones. Do they do anything? One post I read seemed to indicate they did but were hidden. If that's the case how do I "unhide" them?

I'm asking because I'm curious more than anything and I have a habit of finding and pushing limits. I'm strictly a neophyte at blender at the moment and having one hell of a time with the learning curve so it could be the answer is right in front of my eyes and I just haven't seen it...