Might offend some!

What's the difference between a Hoover and a Harley?
You can only get one dirt bag on a Hoover.

What's the difference between a blonde and a washing machine?
If you throw a load in a washing machine, it doesn't follow you around for a week.

What's black and white and red all over and has trouble getting through a revolving door?
A nun with a spear through her head.