Why do people act like blondes are so stupid with blonde jokes? Why not...

[FluteFairy]

...brunettes? the only difference is hair? Not all blondes are dumb, in fact, the only difference is hair color out of us all. People only do jokes about us blonde girls. Never do I hear any about boys (even with blonde hair) or about any other hair color. I mean, sometimes I act stupid without realizing it, haha and people say "you should dye your hair, then you would be smarter) i dont get it!!
Please tell me why

 

[maya]

that's true! some blondes are really smart. it's just in movies and jokes where blondes are dumb.