Something lighthearted.
Taken from issue 110 of the Australian Model Engineer:

Understanding Engineers
Take 1 - To the optimist the glass is half full. To the pessimist, the
glass is half empty. To the engineer, the glass is twice as big as it
needs to be.
Take 2 - Normal people believe that if it ain't broke, don't fix it.
Engineers believe that if it ain't broke it doesn't have enough
features yet.
Take 2 - What is the difference between Mechanical Engineers and Civil
Engineers? Mechanical Engineers build weapons; Civil Engineers build
targets.

Courtesy the Editor David Proctor

GeoffH
Norfolk - UK