Stolen from http://bcn.boulder.co.us/~neal/engineerhumor.html
Engineers Explained

People who work in the fields of science and technology are not like other
people. This can be frustrating to the nontechnical people who have to deal
with them. The secret to coping with technology-oriented people is to
understand their motivations. This chapter will teach you everything you need
to know. I learned their customs and mannerisms by observing them, much the
way Jane Goodall learned about the great apes, but without the hassle of
grooming.

Engineering is so trendy these days that everybody wants to be one. The word
"engineer" is greatly overused. If there's somebody in your life who you think
is trying to pass as an engineer, give him this test to discern the truth.
Engineer Identification Test

You walk into a room and notice that a picture is hanging crooked. You...

1. Straighten it.
2. Ignore it.
3. Buy a CAD system and spend the next six months designing a
solar-powered, self-adjusting picture frame while often stating aloud your
belief that the inventor of the nail was a total moron.

The correct answer is "C" but partial credit can be given to anybody who
writes "It depends" in the margin of the test or simply blames the whole
stupid thing on "Marketing."
Social Skills

Engineers have different objectives when it comes to social interaction.

"Normal" people expect to accomplish several unrealistic things from social
interaction:

* Stimulating and thought-provoking conversation
* Important social contacts
* A feeling of connectedness with other humans

In contrast to "normal" people, engineers have rational objectives for social
interactions:

* Get it over with as soon as possible.
* Avoid getting invited to something unpleasant.
* Demonstrate mental superiority and mastery of all subjects.