Q: When does a person decide to become an engineer?
A: When he realizes he doesn't have the charisma to be an undertaker.
Q: What do engineers use for birth control?
A: Their personalities.
Q: How can you tell an extroverted engineer?
A: When he talks to you, he looks at your shoes instead of his own.
Q: Why did the engineers cross the road?
A: Because they looked in the file and that's what they did last year.