Technically When is a computer like a blonde? When it goes down on you as soon as you turn it on.

What's the difference between a blonde and a computer? You only have to punch information into a computer once.

Q: What's the difference between a blonde and a phone booth? A1: You need a quarter to use the phone.

Q. How do you know a blonde has been using the computer? A. There is cheese in front of the mouse.