differences are only a couple of milimeters deep

We are all concerned with our very individual unique life story. We are all unique. We all look unigue. That's how we know we are all unique. However, our uniqueness is exactly as deep as the thickness of our skin.
Under that layer we are all the same: quite ugly in fact. Like on the posters in the doctor's office. It is good to realize this at all times.

Gunter von Hagens Human Body Exhibition