In the early years of mankind, though sitting up on limbs of threes was both hip and fashionable, Man needed something else to stop the wife 's  complaint about the state of their housing, their nosy naughbour's   and the over crowding.

The heckled male, long over due for a little piece and quiet, noticed that on the ground, large structures could be seen, so, venturing forth, closer examination proved these strange caver ties were both large and spacious and allowed the wife to do her housework  whilst the male, far enough away, to sit in piece and admire her skills.

It was because of this internal safety and the constant bickering that monkey's hair receded and the boldness soon fashionable to all, caveman had emerged.

Below, an early form of house decoration.