Engineers.

#1.

Two engineers were standing at the base of a flagpole, looking at its top.
A woman walked by and asked what they were doing.
"We're supposed to find the height of this flagpole," said Sven, "but we don't have a ladder."
The woman took a wrench from her purse, loosened a couple of bolts, and laid the pole down on the ground. Then she took
a tape measure from her pocketbook, took a measurement, announced, "Twenty one feet, six inches," and walked away.

One engineer shook his head and laughed, "A lot of good that  does us. We ask for the height and she gives us the length!"

Both engineers have since quit their engineering jobs and  are currently serving in the United States Congress.

#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.

#3

Two engineering students were biking across a university campus when one said, "Where did you get such a great bike?"

The second engineer  replied, "Well, I was walking along yesterday, minding my own business, when a beautiful woman rode up on this bike, threw it to the ground, took off all her clothes and said, "Take what you want." The first engineer nodded approvingly and said, "Good choice: The clothes probably wouldn't have fit you anyway."