@freemo

Hole definition / answer

What only the head goes through / 1
What only the arms go through / 2
Designed-in holes, topologically defined / 3
Holes created after manufacture / 4
Topologically defined (assuming the person is wearing clothing that matches the background color / 5
Excluding head and body holes / 6
All topologically defined holes / 7
All holes (common terminology) / 8
All holes including microscopic / 1000s