The Grandmother of all Blonde Jokes:

This blonde decides one day that she is  sick and tired of all these
blonde jokes and how all blondes  are perceived as stupid So, she
decides to show her husband  that blondes really are smart.
While her husband is off at work, she  decides that she is going to
paint a couple of rooms in the  house. The next day, right after her
husband leaves for work,  she gets down to the task at hand.
Her husband arrives home  at 5:30 and smells the distinctive smell  of
paint. He walks into the living room and finds his wife  lying on the
floor in a pool of sweat. He notices that she is  wearing a heavy
parka and a leather jacket at the same time. He  goes over and asks
her if she is OK. She replies yes. He asks  what she is doing and she
replies that she wanted to prove to  him that not all blonde women are
dumb, and she wanted to do it  by painting the house..
He then asks her why she has a  parka over her leather jacket. She
replies that she was reading  the directions on the paint can and  it
said...
(You'll love this...)
"FOR BEST RESULTS,  PUT ON TWO COATS