99% of adults have abnormal faces, they all look different!
Relevant history from the US Airforce in the 1940s when they tried to build a cockpit for the average pilot and failed
I find this an interesting take on the story
I would hate to be one of the ~80 million people in the world who have identical faces
Ok, in that case it's safe to say that the normal is highly variant but generally follows a pattern. People generally have a nose in the center of their face so that'd be normal, but one on the forehead would be abnormal unless everyone suddenly also had forehead noses