"Why 'butt chin nose'? Why not cut out the middleman and just call it a butt nose?"But that didn't make it sound a whole lot better. I began thinking about that kind of shape, and it wasn't long before I realized that it is quite common. In fact, right now this very minute, you, dear reader, are breathing butt oxygen!
I thought some more. I thought of other shapes I had seen that consist in essence of two overlapping spheres, or else two spheres in close proximity. I made a mental list. The creation of such a mental list is left as an exercise to the reader.
However I will say, from over fifty years of observing God's creation, that our Creator has a certain fondness for the idea of two spheres in close proximity.