... Not every one has been on the Titantic.
How do you know if a blonde's been trying to send an e-mail?
.. There's an envelope in the disc drive.
What do you call a blonde with one brain cell?
... Gifted
What do you call a blonde with 2 brain cells?
...Pregnant
Why dont blondes go water skiing?
... They lay down as soon as their crotches get wet

(now the best)

Why are brunettes so proud of their hair color?
... It matches their moustache